Am 18.09.2016 um 14:31 schrieb Wietse Venema:
No, that would log it too often in normal sessions. Instead it can
be logged for rejected commands.
reject: from host[addr] ...; from=<sender>, to=<recip>, proto=SMTP,
helo=<helo>, sasl_username=<user>
Hello Wietse, that would be OK, too. It requires a code change, right? Andreas
