I'm experimenting (using 2.3.0rc1 in my production system) some new
settings, like checkResolvableHelo and checkResolvableEhlo.
I found them very effective in blocking spam during the smtp session, in
addition to blacklists. But I had to drop them because they check also
the helo provided by SMTP AUTHenticated client users, that may typically
have non resolvable names specially if roaming.
I think that this check should be conditioned by the user being or not
SMTP AUTHenticated, as the blacklist check is in RcptCmdHandler, so IMHO
the current behaviour is a bug that should be fixed for 2.3.0. But as
this whole helo/ehlo check functionality was introduced some time ago by
Stefano, he may have given it a different meaning then mine, so I'm not
sure of it.
What do you think about this?
Vincenzo
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