North American Network Operators Group

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AOL 421 errors

  • From: Matthew Black
  • Date: Wed May 03 16:47:30 2006

We've noticed a surge in 421 e-mail errors from AOL.

Message soft bounced for '', '4.3.2 - Not accepting messages at this time ('421', [': (DYN:T1)', 'SERVICE NOT AVAILABLE']) []'

It seems as though they've tightened down their policies.
We're pretty good at preventing spam with our IronPort
anti-spam gateways and internal policies.

We've also subscribed to their FBL notification service.
I'm surprised at the types of messages AOL customers consider
as spam. Anything and everything: university admission acceptance
notices; instructor class assignments; photos from friends; etc.

matthew black
california state university, long beach