Fri Jan 25 20:41:02 UTC 2002
John Payne <email@example.com> writes: > I'm seeing an increasing number of mailing lists that have a unique > envelope from for each message. This may be what qmail's author, DJB, calls VERPs -- Variable Envelop Return Paths. Qmail delivers one message per SMTP connection (see the qmail site for his justification). If each envelop has a unique address, then any bounce can be tracked back to the actual desired destination address. This works even if the bounce message is mangled, mutilated, or passed through a bunch of aliases and forwarders. It's much much more simple than Delivery Status Notification mechanism which requires every MTA in the chain to support DSN or it fails. This makes VERPs very useful for mailing lists, like ezmlm(-idx) which run on qmail. Usually I've seen this VERP as a "extension address", suffixed to the base username with a dash. Perhaps you could filter on the first part before the dash?
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