[TriLUG] Blocking Attachments in Exim/A really wack network admin

[Joshua Gitlin]

Hey TriLUG,

I received a message today from the network admin of USFamily.net. They 
appear to be a small ISP in Minnesota that resells XO Communications' 
dial up accounts and Qwest's DSL accounts. This guy complained that my 
server was sending him "unnecessary and irresponsible bounce messages".

Now, the "unnecessary and irresponsible bounce messages" in question 
are bounces of messages containing potential virus attachments (*.pif, 
*.exe, *.scr, etc). I have these defined (like everyone else) in 
/etc/antivirus.exim. He is complaining the the user(s) with viruses 
aren't his users, and that the virus is forging the From: address, so 
his users are getting bounce messages from me that they don't deserve, 
and this is causing him to have to do more work. (I guess he didn't 
read his job description)

He doesn't seem to care that bounce messages like these are standard 
practice and therefore has blocked my server from sending him emails 
entirely.

My questions are:

1. Should I care? is it worth my time to resolve this problem to 
appease one lazy sysadmin? I do have a few clients with online stores 
on my server that need to send emails to their customers. I don't want 
to prevent my customer's customer from getting their online order 
invoices, etc.

2. Is there any way, with Exim, to block messages with attachments like 
these while the SMTP session is still open, so that bounce messages 
never need to be sent?

3. If #2 is not possible, can I just stop sending him  bounce messages? 
How would I do that in Exim?

Thanks guys!

-Josh

-----------
Due to the recent increase in spam and falsely sent email, I now PGP 
Sign all of my outgoing mail to prove my identity. This means that you 
will see an attachment called "PGP.sig" with this message. This 
attachment can be used to prove that I am who I say I am. If you are 
not familiar with PGP, you can safely ignore it. For more information, 
please visit http://www.pgp.com/ or http://www.gnupg.org/



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