On Tue, Apr 07, 2015 at 10:30:36AM -0400, chris wrote: > I have a few linux webservers and which each send out SMTP directly . > Currently, the webservers all relay the message directly to receipient and > if it cant then it sends back a NDR to the sender advising the sender the > message could not be delivered. > > I want to scale this out a bit and add 2 "backup" SMTP server but what I > want to do is have the webservers try to deliver the message and also have > both SMTP A and SMTP B as backup relays and I want it so that if the > webserver cannot deliver the message directly then have it try SMTP A, this > server would keep the connection to webserver open and attempt to relay > right away and if it fails REJECT the message so the webserver will try the > next server SMTP B etc etc.
A rather similar behavior has Sendmail with a FALLBACK_MX setup, in m4-style (for .mc file): define(`confFALLBACK_MX', `fallback.mydomain')dnl fallback.mydomain may consist of MX entries pointing to SMTP-A and SMTP-B ... To suppress MX lookup, you have to write define(`confFALLBACK_MX', `[fallback.mydomain]')dnl > I am just wondering if anyone knows how to do this or something like it. As > far as MTA I am familiar with exim,postfix,sendmail and not tied down to a > specific one so whichever gives this functionality is fine. [..] I hope, Sendmail is at least one possibility. ;) -- Johann E. Klasek Zentraler Informatikdienst - Kommunikation Technische Universität Wien Tel: +43 1 58801- 42049 A-1040 Wien, Wiedner Hauptstr. 8-10/020C Fax: +43 1 58801-942049 PGP: http://pgpkeys.tuwien.ac.at/ - jklasek - Key ID 37159641 *** There are three kinds of people: men, women, and unix. *** _______________________________________________ mailop mailing list mailop@mailop.org http://chilli.nosignal.org/mailman/listinfo/mailop
