Hi Folks,
I just served off "[log in to unmask]" which seemed to be doing massive searches of our archives.  To such an extent normal list traffic was delayed.  I used a DROP, but from the logs, see it is still trying.

One thing I also see is:

<451 4.1.8 Domain of sender address [log in to unmask] does not resolve
-> MAIL FROM:<[log in to unmask]>
451 4.1.8 Domain of sender address [log in to unmask] does not resolve
<220 bimini.cc.uga.edu ESMTP Sendmail 8.13.8/8.13.8; Wed, 23 Dec 2015 14:47:20 -0500
>EHLO listserv.cc.uga.edu
<250-bimini.cc.uga.edu Hello listserv.uga.edu , pleased to meet you
<250-ENHANCEDSTATUSCODES

" ... Domain of sender address [log in to unmask] does not resolve "

Have others seen this?  Doubtless a very newbie question, but not sure I have encountered this before.

Thanks, and season's best to all.
--Joe

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