You could add some javascript into the webmail system to not allow entering "nobody" as an alias.
Terry Fritts' export (for IMGate) tool:
http://www.smartbusiness.com/imail/
... puts out a text file of known recipients where lines with
@domain.com
... indicates that a nobody alias was detected for domain.com (therefore, no need to export the user list to IMGate for that domain, all users are legit).
You could use that tool in a batch file periodically to enforce a no-nobody policy.
A very useful Imail radio button per-domain would be "yes/no Permit nobody alias".
With spammers abusing domains with tons of random recipients, the nobody alias is more evil than a CIA terrorist analysis or a shrub "mission accomplished" bumper sticker.
Len
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