Re: Gmail blacklisted by Full-disclosure

[Valdis.Kletnieks () vt edu]

On Mon, 20 Jun 2005 09:34:36 PDT, n3td3v said:

> Technical details of permanent failure:
> PERM_FAILURE: SMTP Error (state 10): 554 Service
> unavailable; Client host [zproxy.gmail.com] blocked
> using dsn.rfc-ignorant.org; Not supporting null
> originator (DSN)

Complain to GMail - it's saying that a 'MAIL FROM:<>' is invalid, when
in fact its the *mandatory* way of sending bounce messages. RFC2821, section 6.1:

   If there is a delivery failure after acceptance of a message, the
   receiver-SMTP MUST formulate and mail a notification message.  This
   notification MUST be sent using a null ("<>") reverse path in the
   envelope.  The recipient of this notification MUST be the address
   from the envelope return path (or the Return-Path: line).  However,
   if this address is null ("<>"), the receiver-SMTP MUST NOT send a
   notification.  Obviously, nothing in this section can or should
   prohibit local decisions (i.e., as part of the same system
   environment as the receiver-SMTP) to log or otherwise transmit
   information about null address events locally if that is desired.  If
   the address is an explicit source route, it MUST be stripped down to
   its final hop.

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