Hi Wietse, Thanks very much for your advise; the solution you proposed worked straight-away!
Regards, John ________________________________________ From: [email protected] [[email protected]] on behalf of Wietse Venema [[email protected]] Sent: Tuesday, May 20, 2014 11:18 AM To: Postfix users Subject: Re: re-routing invalid/rejected mail requests John Donath: > Hi, > > I am currently working on an outgoing SMTP relay. > > Nothing magic about that but what I like to achieve is a way to > reroute rejected mail to another SMTP relay. You want to send mail "direct to the internet" and when that fails you want to relay it via the provider? That may be done with soft_bounce plus smtp_fallback_relay. master.cf: smtp ... ... ... smtp -o soft_bounce=yes -o smtp_fallback_relay=[mail.provider.example] The [] suppress MX lookups. It's not a perfect solution: if the provider rejects mail then it is soft-bounced, too. References: http://www.postfix.org/master.5.html http://www.postfix.org/postconf.5.html#soft_bounce http://www.postfix.org/postconf.5.html#smtp_fallback_relay Wietse
