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Re: draft-atkins-smtp-traffic-control

2011-10-29 22:41:02

Robert A. Rosenberg wrote:

At 14:41 +0200 on 10/29/2011, Peter J. Holzer wrote about Re: draft-atkins-smtp-traffic-control:

If a 4xx wait: was received as a reply to a RCPT TO command, try to
resend this message to this specific recipient after the specified time.

OTOH: If this is a multi-recipient message, keep trying until you run out of recipients (remembering which ones were rejected). This way if one or wore were accepted these recipients will immediately receive the message and it will then be requeued for a later attempt with a trimmed recipient list.

Lets keep in mind that mix RCPT TO negative/positive reply codes works only with automated server-based/router MTAs.

With MUAs, its very possible depending on the brand, it will stop once the first 4yz/5yz is seen and will popup an error box indicating the session was not completed.

Old school businesses stuck in their ways still use an MUA as their "mailing list" mail sender. I tried many times to convince one particular customer to install the list server they have in their CD but they can't move away from their old integrated marketing tools long paid for, and even after I got a feel in how these tools are used to seek an easy migration, they seem interested but its still "moving their cheese."

The main situation here is the need to disable the feedback to RCPT TO filters the automated tracking and blocking of bad emails and domains that never make it. When the outbound mailer begins, it finds th bad emails in the block list and doesn't proceed anyway.


Hector Santos
jabber: hector(_at_)jabber(_dot_)isdg(_dot_)net