#1 AI CodingFree
DavMail — alternative #1 to Courier MTA
⚠ - POP/IMAP/SMTP/Caldav/Carddav/LDAP exchange gateway allowing users to use any mail/calendar client with an Exchange server, even from the...
Catalogue source
Recorded alternatives
Alternatives to Courier MTA
Every candidate below sits in AI Coding. What ends up on this page is decided entirely by a recorded score — not by bidding, not by editor taste. Review both records, check current vendor terms, then decide.
#2 AI CodingFree
Maddy Mail Server — alternative #2 to Courier MTA
All-in-one mail server that implements SMTP (both MTA and MX) and IMAP. Replaces Postfix, Dovecot, OpenDKIM, OpenSPF, OpenDMARC with single...
Catalogue source
#3 AI CodingPaid
Proxmox Backup Server — alternative #3 to Courier MTA
Proxmox Backup Server is an enterprise-class, client-server backup solution thatis capable of backing up virtual machines, containers, and p...
Catalogue source
#4 AI CodingFree
Dovecot — alternative #4 to Courier MTA
IMAP and POP3 server written primarily with security in mind. (Source Code) MIT/LGPL-2.1 C/deb
Catalogue source
#5 AI CodingPaid
Zabbix — alternative #5 to Courier MTA
Enterprise-class software for monitoring of networks and applications. (Source Code) GPL-2.0 C
Catalogue source
#6 AI CodingFree
Cyrus IMAP — alternative #6 to Courier MTA
Email (IMAP/POP3), contacts and calendar server. (Source Code) BSD-3-Clause-Attribution C
Catalogue source
#7 AI CodingFree
Exim — alternative #7 to Courier MTA
Message transfer agent (MTA) developed at the University of Cambridge. (Source Code) GPL-3.0 C/deb
Catalogue source
#8 AI CodingFree
Mox — alternative #8 to Courier MTA
Complete e-mail solution with IMAP4, SMTP, SPF, DKIM, DMARC, MTA-STS, DANE and DNSSEC, reputation-based and content-based junk filtering, In...
Catalogue source
Questions about this page
How were these alternatives selected?
Each candidate is a live catalogue record in the same primary category, picked by a deterministic score that Oryxen records in its catalogue: how many meaningful words the two listings share, whether their pricing classes oppose (a paid product against a free one), whether both are open source, and whether either record is featured. The same catalogue state always produces the same list — no randomness, no manual ranking.
Are these alternatives ranked by payment?
No. Rows are ordered only by the recorded score, highest first, with alphabetical ties — payment never influences the order, nothing here is paid placement, and Oryxen charges no listing or placement fee.
Always verify current terms with Courier MTA directly — Oryxen records pricing classes, not live quotes.