Re: How to know local IP on which mail was received on

AMM  wrote:

Or you could add some custom log entry via a ruleset

Can you provide more help with this? I could not find much help in
doc/op/op.*

"It's complicated" - you could do some online search for this.
Here's something completely untested:
Klog syslog
SLocal_check_relay
R$+ $| $+       $: $(log daemon_addr=$&{daemon_addr} $)

I would like change log entry at two places in syslog (systemd journal)

Logging from the binary would need code changes.

Can this be made the default in future versions of sendmail, as in my
opinion it is an important piece of information to detect connection issues.

The simplest approach is to use multiple DaemonPortOptions,
anything else is (significantly) more complicated.
It shouldn't be hard to write a script which takes the local
network configuration and creates the proper mc entries.

OR can the logging be made easier without touching / modifying ruleset?

No - see above: code or ruleset.

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