Hi, i have mailing application that connects to smtp accounts and can send with them direcly from my server, it uses pmta and already works well with esps/free mail accounts like outlook etc, so the application runs fine. However when i try to send emails through an smtp account of [url removed, login to view] , i get the error i ll past at the end of this briefing.. it seems that there are some complicated steps to do in order to authorise my ip and start sending using smtp relay.. i need someone experienced with microsoft office365/onmicrosoft emails that will be able to resolve the issue and explain me the steps that i have to do for the next accounts i want to setup. the error i get is the following: Error: "550 [url removed, login to view] SMTP; Client does not have permissions to send as this sender" while connected from ********* (*******) to [url removed, login to view] ([url removed, login to view])
6 freelancers are bidding on average $27 for this job
I would have bid less than 5, but was not allowed to. For this amount I can tell you why you cannot use an .onmicrosoft account to send emails using SMTP relay.