Scanning of incoming and outgoing mail isn't necessary and can lead to
corruption of your message store (i.e., loss of messages). It provides no
additional protection and even Symantec says it's not necessary:

paste
Disabling Email Scanning does not leave you unprotected against viruses that
are distributed as email attachments. Norton AntiVirus Auto-Protect scans
incoming files as they are saved to your hard drive, including email and
email attachments. Email Scanning is just another layer on top of this. To
make sure that Auto-Protect is providing the maximum protection, keep
Auto-Protect enabled and run LiveUpdate regularly to ensure that you have
the most recent virus definitions.
/paste
http://service1.symantec.com/SUPPORT...02111812533106

McAfee Support
www.mcafee.com/support
--
~Robear Dyer (PA Bear)
MS MVP-Windows (IE/OE, Security, Shell/User)

Franktee wrote:
Hi all
Have heard scanning my outgoing emails (OE) is an ineffective tool. If
this
is true, how do I disable it?. My AV protection is Macfee. Thanks for any
helpful info.