Scanning outbound mail?

[Richard Lynch]

John Wilcock wrote:
> Le 09/02/2012 17:44, Richard Lynch a écrit :
>> So, I'm trying to get a feel for what other sites do.  Do you use
>> MailScanner for outbound mail?  If so how do you handle messages that
>> are rejected?  Do you bounce it or just ignore it or what?
>
> I have things set up with rulesets, to bounce spam and to notify 
> sender of virus/filename/filetype violations for outbound only.
>
> On my small site this has never posed any problems, though for larger 
> sites you'd have to think about the volume implications if an internal 
> sender managed to get infected with a spambot.
>
> John.
>
And this is the exact problem that has brought this question up.  We've 
had some users get infected and spew spam/phishing/etc out in mass 
through our outbound smtp gateway.  This caused the gateway to get 
blacklisted which impacted everyone.  So the question has come up about 
filtering outbound mail.  I don't know if it's a good idea or not.  I 
don't want to create a bunch of problems not thought of -- the cure 
being worse than the ailment!  What do your rulesets look like?

Thanks,
Rich

-- 

Obstacles are those frightening things we see when we take
our eyes off our goal.

Henry Ford