Am 2022-01-30 um 15:01 schrieb michael.osi...@siemens.com:
Requirements for a simplistic MTA with a relay host:
* Support TLS or STARTTLS through OpenSSL in base
* Verify server's certificate chain against default certstore
(/etc/ssl/certs) and log success/failure, e.g, sendmail does this after
config
* Properly rewrite FROM for local users user@localhost or even <> when
delivered with sendmail executable
* Accept messages on localhost:25 or a configurable loopback address in
general (e.g., multihomed with cloned interface and jails) for those
applications which only support SMTP (e.g., Java Mail or other
programming libraries)
Another feature I have forgot:
* .forward support. All mails received on a Unix account shall be
redirected to the user's email address.
Michael
