Re: IETF SMTP Working Group Proposal at smtpng.org

[Valdis.Kletnieks () vt edu]

On Wed, 21 Aug 2002 15:51:36 EDT, Jared Mauch said:
>       i do think some sort of smtp-callback would be nice/useful
> for validation of e-mail addresses.  it'll make it so
> the bounces go to someplace at least instead of Postmaster.

The fact that you can call back in no way means that bounces won't
double-bounce into the postmaster mailbox. I'm sure that yahoo.com
would buy into a callback scheme, but it wouldn;t have done squat for
this double-bounce:

   ----- Transcript of session follows -----
... while talking to mx1.mail.yahoo.com.:
> > > DATA
<<< 554 delivery error: dd Sorry, your message to xxxxxxxx () yahoo com cannot be delivered.  This account is over 
quota. - mta461.mail.yahoo.com
554 5.0.0 Service unavailable

(OK, so THIS double-bounce was a W32/Klez-H generated one, but I get enough
of the same thing for spam with a Yahoo return adress).
-- 
                                Valdis Kletnieks
                                Computer Systems Senior Engineer
                                Virginia Tech

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