Re: [Exim] Exim 4.22 rejecting EHLO CE_HAMM

Hi Ralph, on Tue, 9 Sep 2003 17:30:19 -0400 you wrote:

> 2003-09-09 17:06:23 rejected HELO from pd951f633.dip.t-dialin.net
> [217.81.246.51]: syntactically invalid argument(s): CE_HAMM

Search the archives for "helo" and "underscore" or something similar.
Basically, underscores are not valid names in HELOs. (quite apart from the
fact that CE_HAMM isn't even a hostname)

Quite likely, this is a spam or virus, especially since it's coming from a
dialup. Conceivably, it's something real but in that case the onus is on
the sender to fix their MTA (almost certainly Exchange).

You can reject them at RCPT time instead which will stop them hammering
your server and is more likely to provoke some action from their end.
Again, see the archives.


Tim