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OpenSMTPD might be a bit more popular than Postfix. We know about 1 link to it since March 2021 and only 1 link to Postfix. We are tracking product recommendations and mentions on Reddit, HackerNews and some other platforms. They can help you identify which product is more popular and what people think of it.
Read the documentation on postfix.org and/or buy one of the many available Postfix books (it really helps to understand the Postfix philosophy). - Source: Reddit / 7 months ago
When I installed Rspamd with on OpenBSD / OpenSMTPD the other day, DKIMProxy out (dkimproxy_out daemon), which had been got via OpenBSD Ports package system, was used to add DKIM signatures to mails in order to improve security on emails. - Source: dev.to / 4 months ago
Zimbra - Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.
sSMTP - sSMTP is a simple MTA to deliver mail from a computer to a mail server.
Exim - Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.
Sendmail - Sendmail is a general purpose internetwork email routing facility that supports many kinds of...
iRedMail - A fully fledged, free email server solution, an open source project (GPL v2).
msmtp - msmtp is an SMTP client.