0
votes
2answers
41 views

Error sending emails from a mail server relay type falling into the spam folder (using postfix)

Here I show one of the emails that come to Yahoo, which are falling directly into SPAM folder. The SPF goes smoothly, the DKIM passes without problem, even DMARK passes without problem, but just keep ...
1
vote
3answers
778 views

Sendmail: Sender address rejected (Domain not found)

I'm running into problems with sending mail on our webserver. Some mails are sent and delivered without any problems (eg Gmail), while others are deferred with "Sender address rejected: Domain not ...
0
votes
1answer
218 views

Making CommuniGate Pro react better on SPAM and Backscatter issues

I would like to make a CGP mail server as SPAM free as possible. I made some research but didn't find so much. So my question: where should I start in order to make CommuniGate dealing better with ...
13
votes
4answers
40k views

Fixing My MTA's Poor Reputation

I have a web site that needs to send email to customers to deliver files that they have purchased. Reliable email delivery is vital to this business. Unfortunately, most of the emails sent by my ...