Hi Wietse, This helps. Half reading is always bad. This clears everything about my doubt.
One other thing still remains. I've multiple smtp services defined like this. (in master.cf, to use different IPs, selected randomly) ob-smtp1 unix - - n - - smtp -o smtp_bind_address=1.2.3.4 -o syslog_name=postfix-smtp1 ob-smtp2 unix - - n - - smtp -o smtp_bind_address=5.6.7.8 -o syslog_name=postfix-smtp2 I suppose that if a message delivered via one of the transport and deferred, it'll always be tried via the same "smtp service". Is there a possibility where I can change the smtp service while retrying for a already deferred mail? On Thu, Jul 25, 2013 at 6:06 PM, Wietse Venema <wie...@porcupine.org> wrote: > Abhijeet Rastogi: > > Hi Wietse, > > > > Thanks for you reply. I may be wrong but I just know what I read in > > http://tools.ietf.org/html/rfc5321#section-4.5.4 > > > > > The sender MUST delay retrying a particular destination after one > > > attempt has failed. In general, the retry interval SHOULD be at > > According to RFC 5321 section 5.1, the sending host should try at > least two delivery addresses. > > Quote: > > When the lookup succeeds, the mapping can result in a list of > alternative delivery addresses rather than a single address, > because of multiple MX records, multihoming, or both. To provide > reliable mail transmission, the SMTP client MUST be able to try > (and retry) each of the relevant addresses in this list in order, > until a delivery attempt succeeds. However, there MAY also be > a configurable limit on the number of alternate addresses that > can be tried. In any case, the SMTP client SHOULD try at least > two addresses. > > If you believe that Postfix should wait between the attempts to > connect to the first and the second MX address, then you are in > error. > > Wietse > -- Regards, Abhijeet Rastogi (shadyabhi) http://blog.abhijeetr.com
