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Email spam prevention

I have several servers operating Postfix on CentOS 6.5 and [url removed, login to view] is sending out spam emails and I need to track down where they are coming from or how they are being sent and stop them being sent through my server.

I am receiving returned emails containing this type of message;

Return-Path: <ihskqmmiww@[url removed, login to view]>

Received: from [url removed, login to view] (unknown [[url removed, login to view]])

by [url removed, login to view] (Postfix) with ESMTPSA id 552176237;

Tue, 30 Jan 2018 18:23:31 +0100 (CET)

Message-ID: <333680D3D80C22E13D3871CC78303D46@[url removed, login to view]>

From: "Us CreditOffice" <ihskqmmiww@[url removed, login to view]>

To: <2524349691@[url removed, login to view]>,

<4232703804@[url removed, login to view]>,

<7149284430@[url removed, login to view]>,

<7165453629@[url removed, login to view]>,

<4075952364@[url removed, login to view]>,

<6146617385@[url removed, login to view]>,

<6145519469@[url removed, login to view]>,

<8085810265@[url removed, login to view]>,

<3343150977@[url removed, login to view]>,

<4074954047@[url removed, login to view]>,

<7757712975@[url removed, login to view]>,

<3604084329@[url removed, login to view]>,

<6629049887@[url removed, login to view]>,

<8043502977@[url removed, login to view]>,

<8655998992@[url removed, login to view]>,

<2514013120@[url removed, login to view]>,

<4072426237@[url removed, login to view]>,

<2347076403@[url removed, login to view]>,

<2059072603@[url removed, login to view]>,

<2015633074@[url removed, login to view]>

Habilidades: Manuseio de Email, Linux, Administrador do Sistema, Ubuntu, UNIX

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Acerca do Empregador:
( 20 comentários ) Liverpool, United Kingdom

ID do Projeto: #16229366

Concedido a:

tanujchugh

Hello sir, I am working as server admin from past 8 years and have expertise in it. I will audt the server and will find out the issue which is causing the problem and then resolve it. thanks

$70 USD em 1 dia
(123 Comentários)
6.0

10 freelancers estão ofertando em média $100 para esse trabalho

kuldeepvk

My 9 years of expertise include a deep knowledge of Redhat, WEB hosting services , Email marketing *Web hosting services:- WHm/Cpanel, Website Panel, Plesk Panel Manage all type of server like Dedicated, VPS, Shared Mais

$50 USD em 1 dia
(157 Comentários)
6.4
skynatstech

Hello, We can help in fixing the issue with the mail. We can start now and complete the work in 2 to 3 hours. PS we would need root access to the server to fix the issue. About us ======== We are a team of pr Mais

$100 USD in 0 dias
(186 Comentários)
6.0
A2Design

Hello, We are a team of 30 developers based in Russia. View our featured projects: [url removed, login to view] [url removed, login to view] We specialise in: PHP & PHP frameworks, WordPress & Woocommerce, Openc Mais

$350 USD in 3 dias
(3 Comentários)
5.8
Gauravsingh9828

hi i have good 4 years of experience with Linux. i can help you with that task..!! hope we can discuss the task..!!!

$83 USD em 1 dia
(70 Comentários)
5.5
tlchung

i can check your server and find out which part have security hole that send spam out. I am a skilled server admin with over 10 years experience, i have fix lot of email spam issue.

$100 USD in 3 dias
(73 Comentários)
5.6
numerichost

Hi, I'm an Email Marketing Professional and Focused on Bulk email.I have more than 10years experience. I can Setup Interspire,PowerMTA with all techniques for mailing. You can trust our work. We'll work until you get Mais

$40 USD em 1 dia
(46 Comentários)
5.2
vinskendaj

Hi my name is Ervin and i've 8+ years of experience into the IT, Id like to assist you with your project please reach me out with more details Cheers Ervin

$88 USD in 2 dias
(15 Comentários)
3.3
tsymbalyukivan

I'm working in hosting company as Linux administrator 10 years, therefore I can help you with your task. Also I specialising of blocking spam on the server, clear malware, and make good reputation of IP and your messa Mais

$80 USD em 1 dia
(3 Comentários)
2.0
basharami

Hello there, I am too much interested in your project. We can discuss more over chat. Let's go for an interview and for that please send me a message.

$35 USD in 3 dias
(0 Comentários)
0.0