To the last question ... Yes. Unfortunately.
Happens all the time, and while it's not frequent, it's a headache.

Aloha,
Michael.
-- 
Michael J Wise | Microsoft | Spam Analysis | "Your Spam Specimen Has Been 
Processed." | Got the Junk Mail Reporting Tool ?

-----Original Message-----
From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of Hal Murray
Sent: Tuesday, June 28, 2016 9:07 AM
To: mailop@mailop.org
Cc: Hal Murray <hmur...@megapathdsl.net>
Subject: Re: [mailop] DMARC question


Al Iverson <aiver...@spamresource.com> said:
>> best done by implementing SRS/PRVS/BATV: it creates time-limited
> Do this for years on a high traffic environment with lots of mail and 
> lots of users and lots of individual bounces to track, then you'll 
> find that you're fending off zillions of connection attempts, spammers 
> trying to deliver to those one time addresses, as they get out in the 
> wild, end up found by spambots, etc. ...

Is that also a gold mine of information?

What fraction of that crap comes from ESPs as compared to spambots/zombies?  
What fraction of the zombies are already on major block lists?

Are there occasional legitimate attempts to use a stale address?



--
These are my opinions.  I hate spam.




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