VERP - Variable Envelope Return Path

[Matthias Andree]

David Relson <relson at osagesoftware.com> writes:

> The VERP form is {token1}-{token2}-{number}-{token3}={token4}@{token5},
> as best I can tell.  How much freedom does the mailing list have in
> setting token1 and token2?  Can they have embedded hyphens?

All that matters is that the mailing list driver (ezmlm, ezmlm-idx,
Mailman 2.1, maybe some alpha version of majordomo) understands
it. You'll typically see the list encoded in token1, and I'd guess the
format doesn't support embedded hyphens. However, a different
configuration (list or software) can use a different VERP format.

The VERP must be a) routable, b) parsed reliably by the list driver.

The point about VERP is to reliably identify a bouncing address no
matter how obscure the error message is, ambiguity would defeat the
purpose.

-- 
Matthias Andree

Encrypt your mail: my GnuPG key ID is 0x052E7D95