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Re: IETF SMTP Working Group Proposal at

  • From: Brad Knowles
  • Date: Fri Aug 23 13:22:34 2002

At 12:55 PM -0400 2002/08/23, Greg A. Woods wrote:

 All correctly implemented SMTP mailers _MUST_ modify the envelope sender
 address when forwarding a message to the target address(es) of an alias.
That's a new requirement in a new RFC. How many sites are there in the world that run older MTAs that do not necessarily always implement this rule? Indeed, are there any MTAs which exist today that enforce this rule in all cases? Even if you do have an MTA which implements this rule, what if all you have is the alias, and there is no "-owner" or "owner-" address defined?

So, you run a big site, with tens of millions of customers. Are you going to tell them all to "piss off" if they're subscribed to a mailing list that is not implemented according to this rule?


Brad Knowles, <>

"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
-Benjamin Franklin, Historical Review of Pennsylvania.

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