Postfix is a free and open-source mail transfer agent (also "MTA"), written in 1997 and still actively developed.

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3
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1answer
3k views

postfix - warning: connect to transport private/smtp: Connection refused

I have been having trouble with my postfix+dovecot mailserver. Every time I try to send an email to a different server (gmail etc.) I get the following messages in the log: postfix/qmgr[28918]: ...
2
votes
0answers
639 views

“Recipient address rejected” when sending an email with sendgrid

In postfix, I'm using relay_host to send an email to an external address using sendgrid, but I get an error about local ricipient table when sending an email from my PHP code. This is my main.cf in /...