Dovecot trabalhos

Olá, Montei um servidor de e-mail com postfix, dovecot, mysql, roundcube, spamassassin e amavis. Quando o MTA é o sendmail, o servidor envia os e-mails pra fora de boa, mas quando recebe apresenta a mensagem "user unknow". Quando desabilito o sendmail, e ativo o postifix, não recebo nem envio e-mails, só recebo estas mensagens: Dec 28 22:53:52 uebmail postfix/smtp[19179]: 44DBF69E24: to=<webmail>, relay=none, delay=0.17, delays=0/0/0.16/0, dsn=5.4.6, status=bounced (mail for webmail loops back to myself) Dec 28 22:51:23 uebmail postfix/qmgr[18944]: warning: connect to transport private/smtp: Connection refused Preciso de um profissional hábil para me ajudar com a configuração.

Configurei o meu VPS com CentOS 7 + MariaDB 10.2 e Com PHP 7 e SSL do Comodo. O email esta funcionando porém sem o TSL/SSL. Além disso, quando instalei o PHP 7, o roundcube foi desinstalado. Preciso de alguém que configure o servido de email (exim e dovecot) para funcionar corretamente com o TSL/SLL e que instale o roundcube.

configurar dovecot, postfix e acesso via smtp em provedor dedicado Centos 7

...e já segui tutoriais mas apenas consigo que o servidor funcione para 1 site mas tenho necessidade que suporte mais, de momento tenho 2 lojas magento com mais de 500 produtos cada e em crescimento todos os dias + 1 wordpress e projectados para fazer pelo menos mais 3 wordpress + 1 prestashop/magento. Segui entre outros o tutorial com e sem o ispconfig que é um painel tipo Cpanel mas achei complicado configurar pelo painel e numa segunda tentativa já não usei o painel, testei também outros free mas nenhum tem a facilidade do Cpanel. juntei estas configurações para tirar a melhor performance possível das paginas Magento

...SU. 5.4 Facturación (Contabilización Paralela) • Regla: Un RUT habilitado en la "Empresa A" y en la "Empresa B" se contabiliza como 2 licencias cobrables. 5.5 Seguridad del Super User (SU) • MFA Obligatorio: TOTP (Google/Microsoft Auth). 6. Infraestructura y Almacenamiento 6.1 Stack Tecnológico • Infraestructura: OVHCloud (4 vCores, 8GB RAM, 75GB SSD). • Software: Mailcow (Docker), Python App, Dovecot. 6.2 Tiering (Ciclo de Vida) Scripts programados para optimización de almacenamiento: • 0 - 7 días: Almacenamiento en SSD Local. Sin compresión (Hot Data). • 7 - 30 días: Almacenamiento en SSD Local. Compresión Nivel 6. • 30 - 90 días: Almacenamiento en SSD Local. Co...

We will create a new VM at KVM 6 portal to install Postfix and Dovecot for inbound and outbound emails. We will use SSL and spam security No programming needed.

...one email server for installation at a different VPS. I think you can help me better and much faster with low budget. You will create a new VPS by using our KVM 6 VM You can install Postfix alone or use webmin and we use postfix You will connect Dovecot with post fix and activate SSL You will confirm inbound and outbound mail delivery We will make sure spam box is working as well. (AI by Freelancer) What I expect from you • Install and configure Postfix for SMTP submission and relay with authentication • Install and configure Dovecot so users can retrieve mail via IMAP and/or POP3 (whichever you recommend for reliability) • Enable SSL/TLS throughout, ideally with an automatic Let’s Encrypt certificate • Create the first mailbox and ...

I run a Linux server on Hetzner with CyberPanel and need an email-c...errors, passes Google Postmaster tools). 4. Deploy Snappy webmail under its own sub-domain with valid SSL so users simply visit https://webmail.example.com. 5. Hand over a brief summary of changes plus any commands or panel paths so I can repeat the steps later. 6. I’m open to occasional future maintenance, so keep the configuration clean and document anything custom. CyberPanel, Postfix, Dovecot, Let’s Encrypt, and Hetzner’s DNS console are already in place; feel free to bring whatever tools—dig, nslookup, mail-tester, OpenSSL—you prefer. I consider the job complete when a test message lands in Gmail’s inbox without warning, Outlook syncs flawlessly, and webmail opens o...

...starter Backend structure Agent (panel ↔ server) concept Draft installation scripts Full technical PDF Your mission is to complete, stabilize, and secure the panel. Target systems Ubuntu 20.04 / 22.04 AlmaLinux 8 / 9 VPS & Dedicated servers Main features Server monitoring & service control (Nginx, PHP-FPM, MariaDB, Docker) Multi-domain & multi-user hosting DNS (BIND) & Email (Postfix / Dovecot) Let’s Encrypt SSL (automatic) Firewall & Fail2ban Secure Agent Token system Root panel + client panel Modern cPanel-like interface Deliverables Fully working hosting panel Secure install scripts (Ubuntu & AlmaLinux) Clean source code (ZIP) Basic documentation (English) Important rules no chatgpt No external branding or credits ...

...Troubleshooting & Full Repair - Fix A, AAAA, CNAME, MX, TXT, SPF, DKIM, DMARC - Fix DNS zone issues in DirectAdmin - Configure nameservers (ns1 / ns2) - Ensure DNS propagation - Configure PTR / Reverse DNS - Fix email deliverability issues 2. DirectAdmin Update & Optimization - Update DirectAdmin to latest stable version - Fix any DirectAdmin errors - Update Apache/Nginx, MariaDB/MySQL, Exim, Dovecot - Fix Let’ s Encrypt auto-renew - Clean old configs 3. IP Address Configuration - Link public IP to DirectAdmin - Configure hostname (FQDN) - Update IP assignment for users/resellers - Ensure services respond correctly (HTTP, HTTPS, FTP, Email, SSH) 4. Domain Name Configuration - Connect the domain to the server - Correct DNS zone entries in DirectAdmin - Install SSL (L...

...Troubleshooting & Full Repair - Fix A, AAAA, CNAME, MX, TXT, SPF, DKIM, DMARC - Fix DNS zone issues in DirectAdmin - Configure nameservers (ns1 / ns2) - Ensure DNS propagation - Configure PTR / Reverse DNS - Fix email deliverability issues 2. DirectAdmin Update & Optimization - Update DirectAdmin to latest stable version - Fix any DirectAdmin errors - Update Apache/Nginx, MariaDB/MySQL, Exim, Dovecot - Fix Let’ s Encrypt auto-renew - Clean old configs 3. IP Address Configuration - Link public IP to DirectAdmin - Configure hostname (FQDN) - Update IP assignment for users/resellers - Ensure services respond correctly (HTTP, HTTPS, FTP, Email, SSH) 4. Domain Name Configuration - Connect the domain to the server - Correct DNS zone entries in DirectAdmin - Install SSL (L...

...Troubleshooting & Full Repair - Fix A, AAAA, CNAME, MX, TXT, SPF, DKIM, DMARC - Fix DNS zone issues in DirectAdmin - Configure nameservers (ns1 / ns2) - Ensure DNS propagation - Configure PTR / Reverse DNS - Fix email deliverability issues 2. DirectAdmin Update & Optimization - Update DirectAdmin to latest stable version - Fix any DirectAdmin errors - Update Apache/Nginx, MariaDB/MySQL, Exim, Dovecot - Fix Let’ s Encrypt auto-renew - Clean old configs 3. IP Address Configuration - Link public IP to DirectAdmin - Configure hostname (FQDN) - Update IP assignment for users/resellers - Ensure services respond correctly (HTTP, HTTPS, FTP, Email, SSH) 4. Domain Name Configuration - Connect the domain to the server - Correct DNS zone entries in DirectAdmin - Install SSL (L...

I’m looking for someone who can physically come to our New Delhi office—remote work is not an option—to take charge of an u...configuration, and handle a full upgrade-and-migration cycle to new hardware without disrupting mail flow. You’ll be expected to arrive on-site, review the existing Ubuntu environment, adjust any misconfigurations, migrate data and user accounts cleanly, then validate that everything functions exactly as before—or better—once the cut-over is done. Solid knowledge of Ubuntu server administration, Postfix/Dovecot, DNS, SSL/TLS and mail security best practices will be essential to get this wrapped up quickly. If you’re available to start immediately in New Delhi and can demonstrate hands-on experience with Mobodoa at t...

I have a VPS already provisioned with Ubuntu and I simply need cPanel/WHM installed and activated on it...activated on it—no extra hardening or performance tweaks are required beyond what the vanilla installer provides. A straightforward, clean setup that leaves me with a working cPanel login, the default nameserver configuration, and the ability to add domains right away is all I’m after. Please be comfortable running the official installation script, verifying basic services (Apache/Nginx, Exim, Dovecot, MySQL/MariaDB, etc.) start correctly, and confirming I can reach WHM over the browser once you’re finished. SSH root access is ready for you as soon as we agree on a time. See details of the cPanel to be installed below:

...editions. It must be the Community/Open-Source edition only. Scope of Work & Technical Requirements: 1. Infrastructure & OS: o Deploy on on-premises Linux infrastructure (e.g., Ubuntu LTS). o Optimize OS kernel and file systems for high I/O performance (2000+ concurrent users). 2. Software Stack (Strict FOSS Policy): o Must use a fully open-source stack (e.g., Mailcow, SOGo, or a custom Postfix/Dovecot stack). 3. Outlook Compatibility (The Critical Requirement): o Must implement Open Source ActiveSync (e.g., via SOGo, Z-Push, or Grommunio Community) to ensure two-way sync. o Outlook: Users must be able to use Outlook (Desktop) to sync Email, Calendar, and Contacts without purchasing third-party plugins. 4. Webmail & Collaboration: o Deploy a modern, open-source Webmai...

...reinstall Postfix. Since then, messages are bounced or never show up because the two core services are tripping over file-system restrictions: • Dovecot is throwing file and folder permission errors whenever it tries to reach users’ maildirs. • Postfix will no longer accept incoming mail, clearly a permission-related failure. I need a clean overhaul of user, group and directory rights so that both services can coexist again without rejecting or losing mail. The job is finished when: 1. Dovecot reads and writes every mailbox without permission warnings in the logs. 2. Postfix reliably receives external messages and hands them off to Dovecot. 3. Test messages in and out complete successfully, with logs free of permission or authentication erro...

My current mail stack runs on FreeBSD with Dovecot and holds somewhere between 50 GB and 200 GB of data across fewer than ten mailboxes. I already maintain an active Microsoft 365 tenant and the target mailboxes are provisioned, so this engagement is strictly about the migration itself—no account creation or licence work is required. Scope • Plan and execute a clean IMAP-based transfer (IMAPSync, MigrationWiz, or a proven equivalent is fine). • Carry out one or more delta syncs to capture messages that arrive during the cut-over window. • Coordinate DNS MX switch-over so downtime stays near-zero. • Validate that each user’s folder structure, flags, and any server-side filters arrive intact. • Provide me with a brief post-migration repo...

...optimization. Multi-user system with custom roles and permissions, fully isolating users’ contacts, lists, campaigns, and reports. Per-user sending quotas/credits with daily/monthly/total limits, auto-throttling when limits are reached. Assignment of individual SMTP settings per user, supporting multiple SMTPs while maintaining deliverability. Complete SMTP server setup (Postfix/PMTA) with Dovecot IMAP and optional Roundcube webmail; email headers show only sender domain and sending IP. DNS configuration including SPF, DKIM, DMARC, MX, reverse DNS, and deliverability monitoring; bounce/complaint handling included. Testing of sending, quotas, SMTP, DNS, and deliverability; validation that no server hostname or internal IP appears in email headers. Documentation and ha...

...review and fix issues on our Plesk server running on Debian 11. The system is operational, but several components – especially the mail services (Dovecot/Postfix) – are not working properly after recent issues. In the background, a Proxmox Mail Gateway (PMG) is running as a separate filtering and relay system. The mail flow is configured as PMG → Plesk → Mailboxes. There is also an API integration or automated script that adds domains from Plesk directly into PMG for mail relay and filtering. It is possible that part of the current issue is related to this integration. Current issues: Plesk Webmail (Roundcube) not accessible or showing errors Dovecot not starting properly / SSL configuration errors Incoming emails from specific domains being reject...

I’m looking for a seasoned Linux admin who can take full ownership of a production-grade server that currently runs Postfix + Dovecot for email, a web server delivering both static and dynamic content, a MySQL datastore, and three core backend services (API, authentication, and data-processing layers) that feed our mobile app. Your mission is to keep everything fast, secure, and highly available. Day to day you’ll be hardening Postfix/Dovecot, tightening firewall rules, troubleshooting the occasional delivery hiccup, and fine-tuning VHosts so the web layer stays responsive while we push new releases. On the backend side I’ll rely on you to monitor resource usage, roll out updates with minimal downtime, and make sure each service talks to MySQL efficiently...

...effort. Text generated by FL: I have a fresh Linux server ready to become our new dedicated mail host. I need you to install and harden a custom IMAP / SMTP stack, establish secure TLS connections, set up spam-/virus-filtering, and then migrate every mailbox, alias and folder from the current server with zero data loss or noticeable downtime for users. Customisation is important: Postfix-Dovecot is my first thought, but I’m open to Exim or Sendmail if you can justify the choice and keep management straightforward. Whichever route you pick, please document all configs so I can maintain the system later. Deliverables • Fully functional Linux mail server running chosen IMAP / SMTP software • All user data, folders and aliases copied from the old host and v...

I have a fresh VPS at OVH that’s running AlmaLinux 9 and has whm/cpanel license. I need it fully prepared with cPanel/WHM and then want all my existing assets moved over smoothly. Scope • Install, configure, and harden cPanel/WHM on the new server. • Optimise basic services (Apache, Nginx), PHP, MySQL/MariaDB, Exim, Dovecot) for reliable performance. • Harden and secure the server (firewall, SSH, fail2ban, etc.) • Migrate my websites including their databases and all associated email accounts. • Migrate all data, accounts, and configurations from my current WHM server to the new VPS • Verify that each site, database connection, and mailbox works exactly as before, with SSL certificates re-issued if necessary. • Ensure all services (e...

I need a full-stack developer (Laravel or WordPress) with Docker and Linux server experience. The project is – “Tu espacio en red”, a subscription-based platform that gives users: A Nextcloud account (different disk quotas, apps, and permissions by plan). A Mail account on our own mail stack (Postfix + Dovecot + Rspamd + OpenDKIM + OpenDMARC + Roundcube). Everything hosted in one Docker environment on a single dedicated server. The base server is ready — I just need the full system working, including design and branding customization. Main tasks Platform (Laravel or WordPress) User registration & login system. Admin dashboard to create/edit plans/packages (disk quota, mail quota, Nextcloud apps). Subscription system (Stripe or PayPal). Automatic provisio...

I need a complete, production-ready mail system installed in a physically secure datacenter environment. The core requirement is end-to-end delivery over SSL/TLS so every connection—IMAP/POP, SMTP submission, and server-to-server relay—remains encrypted by default. I haven’t locked myself into a specific stack, so feel free to propose Postfix with Dovecot, or any other combination you trust; stability, security, and maintainability are what matter most. • Mail services – Install and configure the chosen SMTP and IMAP/POP services. – Generate or obtain trusted SSL certificates (Let’s Encrypt is fine) and enforce TLS-only connections. • DNS & delivery hygiene – Create the required MX and A records. – Advis...

Por favor, Cadastre-se ou Faça Login para ver os detalhes.

Afte...mailbox on the panel. Webmail now throws an SSL-related error message and, when it finally loads, the inbox shows up completely empty. Mail clients can’t connect to the server at all—they simply report “can’t connect to server.” I need someone to trace the root cause and get email working again for all domains hosted on this instance. Whether the fix involves repairing SSL certificates, rebuilding Dovecot/Exim configs, or applying a patch to CyberPanel itself, I just want users to be able to log in, see existing mail, and send/receive without errors. Please be comfortable working directly on a live Alma Linux 9/Ubuntu server running CyberPanel, restoring normal IMAP/POP3/SMTP and webmail functionality, and documenting the steps you take so I ca...

I’m running Ubuntu 24.04 with Virtualmin Pro, Apache and Mailwizz. Every domain on the server already has its own dedicated IP, but the one-to-one mapping isn’t working where it matters: Mailwizz can’t validate through SMTP because port 587 simply w...OpenSSL/TLSv1 complaint. • Leave the existing Virtualmin/Apache stack intact; this is purely a mail and networking fix. • Hand me a brief rundown of what you changed so I can repeat it if I add new domains later. I have already walked through the obvious firewall rules and a few Postfix tweaks without success, so I’m looking for someone who has concrete experience wrangling Virtualmin, Postfix, Dovecot and Mailwizz at scale. If you’ve untangled similar 587 or TLS issues before, that’s ...

I have my own domain and a dedicated server and now need a full-featured, self-hosted email system running on that infrastructure. The core objective is straightforward: send and receive mail reliably under my company’s domain without relying on third-party SaaS providers, all whil...fully operational mail server installed on my machine, tied to my domain with correct DNS, MX, SPF, DKIM, and DMARC records. • Web or recommended client interface configured and branded with our logo. • Admin guide covering user creation, backups, and routine upkeep. • A brief hand-off session to walk me through the setup and answer questions. If you’ve deployed solutions like Postfix, Dovecot, Exim, Zimbra, or similar and can wrap everything with solid security practic...

...tutorials but need real-time guidance—every step will happen on my laptop through a remote session and I will keep all credentials local, so you’ll be directing me rather than logging in yourself. Scope of help I need • Configuring DNS settings (A, MX, SPF, DKIM, DMARC, PTR) • Installing and configuring the Synology Mail Server Classic software and any required companion packages (Postfix/Dovecot components inside DSM) • Setting up security and encryption, including SSL/TLS certificates and SMTP authentication • Testing end-to-end delivery, spam score, and client connections (IMAP/SMTP) I’d also like you to double-check everything, including creating at least one mailbox with me to be sure the workflow is clear. Deliverable A f...

I run a Linux server on Hetzner with CyberPanel and need an email-ce...settings work without repeated prompts. 4. Deploy Snappy webmail under its own sub-domain with valid SSL so users simply visit https://webmail.example.com. 5. Hand over a brief summary of changes plus any commands or panel paths so I can repeat the steps later. 6. I’m open to occasional future maintenance, so keep the configuration clean and document anything custom. CyberPanel, Postfix, Dovecot, Let’s Encrypt, and Hetzner’s DNS console are already in place; feel free to bring whatever tools—dig, nslookup, mail-tester, OpenSSL—you prefer. I consider the job complete when a test message lands in Gmail’s inbox without warning, Outlook syncs flawlessly, and webmail opens o...

I'm seeking an experienced system administrator to help get Dovecot 2.4.1 on Debian 13 operational, specifically addressing issues with MariaDB integration for password control and user account information. Key requirements include: - Fixing configuration errors with Dovecot - Resolving user authentication integration issues Ideal skills and experience: - Proficiency in Dovecot and MariaDB - Strong background in Debian server management - Experience with user authentication setups Your expertise will be crucial in ensuring a smooth and secure mail server operation.

I'm seeking an experienced VPS server administrator to help with setup and configuration. Setup and inst...help with setup and configuration. Setup and install on Server with the following FFmpeg Zendesk Modernizr Node.js with RESTful APIs React Vue.js Cold Fusion Ruby Key Tasks: - Set up and configure ssl certificate - Set up and configure a web server (Apache or Nginx). - Set up and configure a database server (MySQL or PostgreSQL). - Set up and configure an email server (Postfix or Dovecot). Ideal Skills & Experience: - Proficiency in Linux server management. - Strong experience with web, database, and email server configuration. - Excellent troubleshooting and support skills. - Security best practices knowledge. Please provide relevant exper...

I’m running HestiaCP on an Ubuntu server and, after installing PHP 8.1 alongside PHP 8.3, the Roundcube interface stopped loading altogether. The login page never appears—just a blank response. Prior to the version swap I had edited several ...earlier file edits are at fault, roll them back or rewrite them cleanly. Acceptance criteria • /webmail loads the Roundcube login screen without PHP or JS errors • I can log in, send, and receive a test email successfully • A short changelog of what you touched so I can repeat the fix after future PHP upgrades You will need solid experience with HestiaCP, Roundcube, PHP 8.x, Postfix/Dovecot, and the typical Nginx+Apache proxy setup that Hestia deploys. I’m ready to give you SSH and panel access as ...

I’m looking for a developer with strong experience in Node.js, TypeScript, and Linux mail servers (Postfix, Dovecot, etc.) to help polish and productionize part of our SaaS. We already have ~80% of the logic working. I built the base with Claude Code, and while it does work (we’ve tested on OVH VPSes), the app is still “vibe coded.” What we need now is a real developer to take it the final 20%: - Make it PRODUCTION READY — clean, stable, and bug-free - Add proper API endpoints so it can be plugged directly into our SaaS as a microservice - Fully test it (stress tests, edge cases, error handling) so we don’t have to hunt for bugs later - Polish and improve the current code, not just patch it What the app currently does (already working at a basic...

...instance at has suddenly stopped responding: the admin panel isn’t loading at and every mailbox login attempt fails. I haven’t altered any server settings prior to this, so I’m looking for someone who can step in immediately, locate the root cause—whether a stalled Docker container, broken certificate, Nginx reverse-proxy rule, or a Postfix/Dovecot glitch—and restore full functionality. Deliverables • Admin UI reachable over HTTPS • Successful authentication to at least one test mailbox via webmail and IMAP/SMTP • Short report outlining the issue and the exact fixes applied (commands, config lines, services restarted) This is an ASAP job; please only respond if you can start right away and work over SSH until everything is back onl...

...instance at has suddenly stopped responding: the admin panel isn’t loading at and every mailbox login attempt fails. I haven’t altered any server settings prior to this, so I’m looking for someone who can step in immediately, locate the root cause—whether a stalled Docker container, broken certificate, Nginx reverse-proxy rule, or a Postfix/Dovecot glitch—and restore full functionality. Deliverables • Admin UI reachable over HTTPS • Successful authentication to at least one test mailbox via webmail and IMAP/SMTP • Short report outlining the issue and the exact fixes applied (commands, config lines, services restarted) This is an ASAP job; please only respond if you can start right away and work over SSH until everything is ba...

...secure, centralized IT infrastructure using my existing Dell PowerEdge R320 and R210 servers. The system will support 5 laptops and should include: - Centralized Remote Desktop Services (RDS) - In-house web hosting - Self-hosted email system using Postfix with Dovecot - Document Management System (DMS) of your recommendation - Multi-layer backup solution - Lowest possible monthly operating cost Preferred Operating System: Windows Server Ideal Skills and Experience: - Proficiency in Windows Server - Experience with Postfix and Dovecot - Knowledge in setting up RDS, web hosting, and DMS (OwnCloud, NextCloud, or SharePoint) - Strong backup and security implementation skills - Cost-effective solution design Please provide a detailed plan and estimated monthly costs. Lookin...

...virtual NICs per VM: one for NAT internet access, one for a host‑only private network. Server provides DHCP on the private network (e.g., 192.168.10N.0/24) while the client obtains its IP from the server. Proper hostname assignments ( and ). ✅ Server Configuration: Install and configure DHCP, NFS, Samba, DNS (forward and reverse zones), Sendmail/Dovecot (mail), and Apache (web server with a custom welcome page). Create specific local user accounts and enable services like VNC and printer sharing (CUPS). Configure firewall rules allowing only key services (SSH, HTTPS, POP3S, SMTP, DNS, NFSv4, IPP, VNC, Samba) and implement SNAT for internet access. ✅ Client Configuration: Mount Samba and NFS shares (automatically via fstab) and schedule backups

...experienced developer to set up a mail server using Docker Compose that integrates with Cloudflare DNS. The server should support both sending and receiving emails, and I prefer using Dovecot as the email server software. The server will be hosted on a Hostinger VPS. Key Requirements: - Configure a mail server with Docker Compose - Use Dovecot for handling both SMTP and IMAP/POP3 functionalities - Integrate with Cloudflare DNS for domain management - Deploy the server on a Hostinger VPS Ideal Skills and Experience: - Strong experience with Docker and Docker Compose - Proficiency in setting up and configuring Dovecot for email services - Knowledge of DNS management, specifically with Cloudflare - Experience with VPS hosting environments, particularly Hostinger - Ab...

I am in need of an experienced Linux administrator to set up a dedicated server . The server will host both mail and web services, and I require a comprehensive security setup to ensure optimal performance and protection. Key Requirements: - Set up email server with Postfix, Dovecot, Roundcube (or similar) -Configure SPF, DKIM, and DMARC records for proper email deliverability -Set up dedicated IP for cold emailing -Install and configure cPanel or CyberPanel (optional) -Harden the server (firewall, fail2ban, SSH keys) -Secure SSL (Let's Encrypt or paid) -Possibly assist with hosting WordPress or applicant tracking system Ideal Skills and Experience: - Proven experience in Linux server administration, specifically with OVHcloud - Expertise in configuring and managing Postfix ...

I need assistance to fix the postfix/dovecot/opendkim setup on my server to ensure it operates as a secure, full-service IMAP mail server. Currently, I am experiencing issues with SMTP authentication failures, although receiving emails is functioning correctly. I want to ensure that SMTP is working properly. I have not used this setup before, and it has been a while since I last configured a mail server. Key Requirements: - Resolve SMTP authentication failures. - Ensure SMTP protocol is functioning properly. - Configure postfix, dovecot, and opendkim for secure email operations. Ideal Skills and Experience: - Expertise in configuring and troubleshooting postfix, dovecot, and opendkim. - Strong understanding of SMTP, IMAP, and general mail server protocols. - Experien...

...the MVP of a secure, self-hosted, Outlook-compatible email and calendar platform. This project aims to provide businesses with a viable alternative to Microsoft Exchange and Google Workspace — with full calendar syncing, robust spam protection, and enterprise-ready features. Key Project Requirements: Create a custom MTA (or build around Postfix) for reliable email delivery Use (or replace) Dovecot for IMAP/POP3 email retrieval Implement calendar support (CalDAV) with shared calendars and meeting invites Enable secure authentication (OAuth2, MFA, device-based login) Admin dashboard for tenant and user management REST APIs for mailbox/user provisioning Docker/Kubernetes deployment-ready Must be scalable for medium to large organizations (up to 1000 users) Prio...

I'm seeking an experienced Linux sysadmin to troubleshoot and fix issues with my self-hosted email server. The server is currently not functioning properly, affecting email operations. Key requirements: - Expertise in managing and troubleshooting Linux-based email servers - Proficient in diagnosing and resolving email delivery issues - Familiarity with email server software (Postfix, Dovecot, etc.) - Ability to ensure server security and prevent future outages Please provide a brief overview of your experience and approach.

Configure Dovecot for High-Concurrency / Unlimited IMAP Connections (ECS Fargate) Description: We’re looking for an experienced Linux system administrator or DevOps freelancer to help configure Dovecot for high-concurrency on our existing deployment. Our service is already running on **AWS ECS Fargate**, and **scaling is fully managed** on the infrastructure side. What we need is help tuning Dovecot itself to support **unlimited or extremely high numbers of IMAP/POP3 connections** per task/container. Responsibilities: * Configure and optimize Dovecot for high-connection use on ECS Fargate containers. * Modify and test performance-related settings (`default_process_limit`, `client_limit`, `mail_max_userip_connections`, etc.). * Adjust system-level limi...

...goal is to have fully functional, reliable, and secure email accounts for key business emails and ensure the server maintains a clean reputation to avoid spam filtering. Key Responsibilities: • Diagnose and fix all existing issues preventing email sending and receiving via Roundcube webmail and other clients. • Configure and optimize mail transfer agents (Exim or Postfix), IMAP/POP3 servers (Dovecot), and related services for stability and security. • Set up and verify DNS records: SPF, DKIM, DMARC, and reverse PTR records for both domains to maximize email deliverability and trust. • Analyze and resolve any spam or blacklist issues affecting server IP and domain reputation. • Remove server or domain blacklisting and monitor ongoing server reputatio...

I need a Dovecot (or similar) SMTP mail server deployed on Oracle Cloud Infrastructure. The setup must include SSL/TLS encryption for security. I have two domains that I want to be used for the email server, as well as 2-3 subdomains that are being used for email. I'd also like to have RoundCube or something similar that will be used to access the email interface Key Requirements: - Deploy Dovecot (or similar) as the mail server software - Implement SSL/TLS encryption for secure connections - Configure basic SMTP functionalities - Other functionalities that will be discussed on the fly (e.g. interfaces and DNS configuration) - Emails should be spam resilient and have a 100% or almost 100% delivery rate (and acceptance rate) Ideal Skills and Experience: - Experience wit...

...We’re looking for a hands-on Lead Engineer / Technical Architect to design, build, and launch the complete infrastructure and customer-facing platform. You’ll work closely with the founder to own the technical roadmap, choose the right stack, and lead all core engineering efforts from Day 1. Responsibilities: Architect and deploy a scalable, secure email hosting infrastructure using Postfix, Dovecot, Rspamd, and Docker (Mailcow or custom) Set up and maintain SMTP, IMAP, and webmail (Roundcube or SoGo) Configure and automate DNS record handling (SPF, DKIM, DMARC, rDNS, MTA-STS, BIMI) Integrate API-based provisioning, billing (Stripe/PayPal), and user management Build and manage backend systems (Node.js/PHP) and user dashboard (React preferred) Opti...

...future maintenance. Duration and Payment: This task is expected to be completed within 1–3 days on a fixed-price basis. Requirements: • Proven experience with Linux server administration on DigitalOcean (or similar cloud environments). • Expert-level knowledge of Nginx, PHP‑FPM, and WordPress multisite migrations. • Hands‑on experience with email system setup and troubleshooting (Postfix, Dovecot, etc.). • Excellent communication skills and the ability to work collaboratively, documenting changes clearly. • Availability to review the existing data on the old server and plan the migration in detail. How to Apply: Please provide a brief overview of your relevant experience, examples of similar projects you have completed, and confirm that you ...

I need assistance configuring shared IMAP folders on my email server using Dovecot and Roundcube. Currently, I'm using Exim with Dovecot and Roundcube. I can set custom permissions through Roundcube, but I'm having trouble getting the shared folders to show up. Key requirements: - Expertise in Dovecot, Exim, and Roundcube - Experience with setting up IMAP shared folders - Ability to troubleshoot and resolve IMAP folder visibility issues in Roundcube Your role will be to ensure that the shared folders are properly configured and visible in Roundcube.

I need assistance migrating 3 corporate email domains, with a total of 646 accounts, from the paid service to a suitable free alternative. Options include Zimbra, Postfix + Dovecot, Mailcow, or iRedMail. Key Tasks: - Recommend and set up the optimal free email server - Configure email records (MX, SPF, DKIM, DMARC) for each domain - Ensure stable sending/receiving of new emails post-migration - Test the email functionality after the move - If possible, transfer old emails (not necessary, but ideal) You will have access to all required domains and existing server. I am open to suggestions for the server and configurations. The sooner this can be done, the better. The ideal candidate should have experience with email server setups and migrations, with a strong understanding of the ...