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Attachment blocking in incoming e-mails

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lardum

IS-IT--Management
Apr 26, 2000
462
SE
is it possible to block attachments based on filetype in Cisco PIX? I'm using version 5.1(4). Currently my antivirus vendor doesn't support blocking as many files as i want. I want to block 50 filetypes and when i do so with Norton Antivirus for Exchange the e-mails are being delayed for a couple of hours.

 
HI.

No, the pix does not have such option, only with external mail relay server or content filter.

What version of NAVMSE do you have?
What version of Exchange?

Maybe a newer version will solve the problem.
You should also check the MAPI/VAPI configuration of NAVMSE - it has relation to performance.
There is also another option in NAVMSE web interface to scan attachments in the background so you can read about it in the README.TXT and try it.

Applying latest service pack for Exchange can also help.

Take a look here for easier management of the attachment blocking with NAVMSE:

Bye
Yizhar Hurwitz
 
I'm using Exchange 5.5 SP4, with NAVMSE 2.1. I run it in MAPI/VAPI mode.

E-mailed Norton Tech and they answered that Norton doesn't handle so many attachments and that it is normal that the messages get delayed.

One funny thing that i discovered is that e-mails coming from one e-mail system are ok (no delay) and from another e-mail system all e-mails gets delayed.

 
HI.

I would suggest upgrading to NAVMSE 2.5 or newer (comes with NAVCE 7.6 or later).

>> One funny thing that i discovered is that e-mails coming from one e-mail system are ok (no delay) and from another e-mail system all e-mails gets delayed.

This might be related to the email format and client at the sender side - maybe emails sent from MS-OUTLOOK using TNEF (rich text) are slower to scan then MIME enconded attachments, and maybe vice versa.

If you have the founds and need, you can switch to another 3rd party mail filter that can do a better job.

Bye
Yizhar Hurwitz
 
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