Re: [exim] syntactically invalid argument(s) - rejected HELO

On Thu, 16 Dec 2004, Tony Finch wrote:

| I don't think there's much point in trying to fix the world :-)
|
| People have tried to use technical competence as an anti-spam technique,
| but it doesn't work because legitimate email senders are generally less
| clueful than the spammers.

However, lack of technical competence can indicate a remote system likely
to be exploitable.

If someone can't setup DNS properly, or get their HELO right, then it's
reasonable to conclude their security will be lacking too and the spammers
will find a way to abuse it.

We generally use this sort of thing as filter-fodder, rather than grounds
for outright rejection.


--
Chris Edwards, Glasgow University Computing Service