'Brian Tillman [MVP - Outlook Wrote:

Brian Tillman [MVP - Outlook] wrote:
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Why, when there is no technical reason in the world to have it (the AV)
enabled? It does NOT add to your safety and DOES interfere with Outlook
operation.
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Must disagree there. I've tested with/without the AV email scan enabled
using the EICAR test virus. If enabled, the virus, even with a changed
"acceptable" extension like .zip, gets nuked by the email AV scan and
notifies within Outlook:
Attachment file : eicar.com.zip
Scanner Detected: EICAR test file (Test)
Action taken : Moved (Clean failed because the detection isn't
cleanable)

In my book ^that definitely IS adding to the safety factor.
Without the AV enabled Outlook will happily let you
save/open/forward/whatever the message, relying on your desktop AV
real-time to catch any bugs.

As for the "DOES interfere with Outlook operation" I've already tested,
on a new incoming forwarded message, with NO AV at all, and with the
email AV disabled and with it removed; the problem remains.
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No, it appears that whatever generates the EML attachment is doing so
in
such a way that Outlook cannot decode it properly.
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That I can buy.
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It's possible that since the AV plug-in for OE and for Outlook are
different, one might interfere while the other doesn't. It's also
possible
OE isn't as sensitive to the interference.
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In the EICAR test, the email AV scan did not work with OE. I'd say it's
specific to Outlook.
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Clearly if OE has trouble as well; it's the message content that is in
error. It would be interesting to see the raw message content. I
suspect header malformation that is ignored by Thunderbird or the web
browser.
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While OE had "trouble" it still worked in acceptable fashion. It showed
me attachments that, tho' nested, I could open and get to all the
original message content. Which to me means that while not perfect, the
IMAP support in OE is still better than in Outlook '07, if not as good
as non-MS products. Unfortunately using OE isn't an option.

Tx,

M