Are SMTPS and IMAPS ports really deprecated?
knight_lightning asked: I’ve read that STARTTLS command was added and intended to deprecate the SSL ports. But even major mail servers like google still use SSL ports and even don’t …
Getting postfix to relay SMTP/SSL/TLS to Charter/Spectrum
Nstevens asked: I’m running Postfix on Debian as an MX for a small LAN and trying to get SMTPS working with mobile.charter.net over port 587. I followed a few links …
Sendmail – retry instead of permanent failure on DNS errors
Hungrig asked: The last few days, our hosting provider has had occasional connectivity issues with one of their upstreams. Each time this happens, we end up with a heap of …
Provider for outgoing mail from own Postfix server
svoop asked: I’ve been running Postfix on my own dedicated server (hosted by Hetzner) for years, however, it’s getting increasingly difficult get outgoing mail to Outlook/Hotmail and sometimes Google delivered. …
Correct DKIM, Reverse DNS configuration to send from 2 different domains?
John Moore asked: I have set up Postfix on an Ubuntu 18.04, with a view to sending emails from two different domains, which I will refer to here as abc.com …
Default SMTP functionality if one of multiple addresses is invalid
freefaller asked: Although this is effectively a programming question, my gut feeling is that subject is more suited to this site. However, if you feel it is better suited to …
Postfix and Dovecot – No encryption on SMTP
BDevGW asked: currently I’m working on my veary own mailserver but as for now I can’t get SMTP up correctly. I use Dovecot with postfix. When I try to ad …
Check if open SMTP connection is closed/timed out
clarkk asked: Is it possible to send some sort of ping to a SMTP server to check if the connection is still open and ready to send a mail The …
My mail hosting provider rejects test email relayed from postfix on FQDN-less host, but thunderbird ok
Adam asked: When I send mail with Thunderbird via my mail hosting provider, there’s no problem. However I set up postfix in the usual way so that it functions as …
Does Postfix also operate as MSA?
papakota asked: I’m just curious whether Postfix also plays a role of MSA in a process of SENDING an e-mail? In other words, does MUA “talk” directly to MTA (say, …