Speaking for myself, if I were managing such mailings, anything longer than 3 
months and I'd wanna toss it and start over.
Or at the very least, send it out from a dedicated IP pool different from the 
ones used by the main lists.

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

-----Original Message-----
From: mailop <mailop-boun...@mailop.org> On Behalf Of Hal Murray
Sent: Wednesday, March 7, 2018 2:36 PM
To: mailop@mailop.org
Cc: Hal Murray <hmur...@megapathdsl.net>
Subject: [mailop] Old lists - how old?

> Some of them do and clearly states how many months they keep a 5xx 
> error before turning the domain into a spamtrap.

Is there a BCP or consensus on how long a list can sit inactive before it 
should be thrown away?

These are my opinions.  I hate spam.

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