Hi Wietse, thanks for your nice comments.
I guess what you mention is valid for "my internal postfix relay server"->"ISP mailserver" - or am I mistaken ? What is valid for "internal linux servers"->"my internal postfix relay server" (and only for outgoing mail - no incoming mail this way...) ? Thanks in advance :-) ! ~maymann 2011/12/23 Wietse Venema <wie...@porcupine.org> > Michael Maymann: > [ Charset ISO-8859-1 unsupported, converting... ] > > Hi list, > > > > Robert: thanks for your quick reply. > > Sorry for being vague - This is for internal outgoing mail only (my linux > > servers->my postfix relay server->ISP mailserver). > > I would like loadsharing (maybe real balancing is not needed for me...) > > between my linux server->my postfix relay server. > > My guess is I could do this (atleast) 2 ways: > > 1. DNS RoundRobin > > 2. MX with equal weight > > > > Any thoughts: e.g. will mail actually retry delivery for all IP's listed > in > > DNS RR if one is not responding, or will it just directly return to > > sender=local linux user without trying any of the other IP's...) ? > > According to these: > > http://www.postfix.org/postconf.5.html#smtp_mx_address_limit > http://www.postfix.org/postconf.5.html#smtp_mx_session_limit > > The Postfix SMTP client will try at least five IP addresses or two > SMTP sessions, When it reaches either limit, Postfix will > try another delivery later for several days. > > The retry schedule behaves as documented at: > > http://www.postfix.org/TUNING_README.html#hammer > > Wietse >
