Steven Peterson:
> Dear Postfix Maintainers:
>
> Thanks for a great package.
>
> I am using sender_transport to specify custom bind IP addresses, helo name,
> and logging for our clients sending newsletters. In general this works
> well, but with some ISPs, when deferring our e-mail, the only entry in the
> postfix logs is under the 'error' process. For most ISPs, the smtp process
> has the results of the conversations. Which process logs the 'deferral'
> notice is important because 1) we need the normalized format output by the
> smtp process; and 2) we need the custom log name that accompanies the smtp
> process.
When a destination blocks all mail, the queue manager skips
the SMTP client and defers email with the error daemon, for
some configurable amount of time (no time to look that up).
When a site does not accept mail, it is bad citizenship to
hammer them to death.
Wietse
