Updated sendmail to 8.11 (RedHat 7 version) and now sendmail listens on
Why is that?
Since it is sendmail is linked to cyrus-sasl and OpenLDAP it might be
because of that.
(But then again - we do not use LDAP or SASL here).
It's the MSA service sendmail now provides. Quoting the release notes:
sendmail implements RFC 2476 (Message Submission), e.g., it can
now listen on several different ports. Use:
O DaemonPortOptions=Name=MSA, Port=587, M=E
to run a Message Submission Agent (MSA); this is turned
on by default in m4-generated .cf files; it can be turned
off with FEATURE(`no_default_msa').