Hi --

I've recently upgraded my DEC Alpha to Berkeley Sendmail 8.8.6 and now
(with the  arrival of students) I'm suddenly receiving lots of messages
like this.  Is there something I should look at in my ListServ setup or are
these errors coming from one of my users who has misconfigured their E-mail
settings? (See sample below)

Any advice would be most appreciated!!

Debby Quayle

-------------------------*---------------------------
Debbora (Debby) Bartel Quayle
Asst. Dir.ITS, Technical Support Services/
               Help Desk & E-mail Administration
Information Technology Services Department
Hamilton College (315) 859-4031  [log in to unmask]
-------------------------*---------------------------

 ----- The following addresses had permanent fatal errors -----
<[log in to unmask]>

   ----- Transcript of session follows -----
554 rewrite: map @ not found
... while talking to microsoft.ease.lsoft.com.:
>>> MAIL From:<@@hamilton.edu>
<<< 501 Syntax error in return path
501 <[log in to unmask]>... Data format error

PS:I checked my Sendmail ruleset and it only contains one @ character.  I
don't know where else to look.