Anthony R. J. Ball wrote:
Hi, I run a host on a comcast cable modem and am subsequently
on the mail.abuse.com's DUL (Dynamic User List). I want to set
up qpsmtpd to try direct smtp first, and on failure, use comcast's
smtp (they rate limit pretty tightly, so I can't send all mail
this way).
qpsmtpd is primarily intended to handle inbound messages, so even in a relay situation, it will queue the message with another MTA for delivery purposes. You could rewrite queue/smtp-forward so that it only fired if $connection->relay_client() was set, and then add code to resolve the MX record for the domain before attempting to deliver. This is not a trivial undertaking by any stretch.
IMNSHO, you are better off getting a real ISP and a fixed IP address, so you don't appear on the DUL at all.
John
