OpenSMTPD
Postfix
sSMTP
Exim
Sendmail
msmtp
iRedMail
Dragonfly Mail Agent
mailslurp
Mailtrap
MailHog
Mailosaur
MailCatcher
FakeSMTP
MailSpons
Smtp4dev
Create email addresses and phone numbers on demand in code, tests and using online dashboards. Test applications end-to-end with real email and SMS using REST APIs, SDKs, and custom mail servers.
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Based on our record, OpenSMTPD seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I've had something of the same experience with Postfix, u/0x29aNull. Check out OpenSMTPD. It is lightweight and standards compliant. I know that there are packages for Debian and Alpine Linux. There may also be ones for Fedora/RHEL derivatives. I use it in my environment on OpenBSD. Source: about 1 year 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 / almost 3 years ago
Postfix - Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail.
Mailtrap - Email Delivery Platform that delivers just in time. Great for businesses and individuals.
sSMTP - sSMTP is a simple MTA to deliver mail from a computer to a mail server.
MailHog - MailHog is an email testing tool inspired by MailCatcher, but easier to install.
Exim - Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.
Mailosaur - Email Testing for QA & Development Teams.
