Re: retry 5xx using a fallback outgoing IP

the primary mx is not refusing *me* the postifx box, it's refusing connections initiated by me from one of the two IP address.

Do the RFCs handle such cases? (fallback to a different smtp_bind_address)

Does postfix have some round-robin or fallback choice of smtp_bind_address?


Re: retry 5xx using a fallback outgoing IP

By Noel Jones at 08/11/2017 - 11:28

On 8/11/2017 4:44 AM, Mai Ling wrote:
The RFCs and postfix allow retry from a different IP in the case of
4xx temporary failures.

The RFCs and postfix do not allow retry after a 5xx permanent rejection.

Attempting to workaround this will likely get your working IP and
your sending domain blacklisted. Don't do it.

-- Noel Jones