All i can think of is. Setup 3 postfix dual smtp. Server 1, incoming relay. Which delivers on server 2 and 3 with dual smtp.
Server 2 to Vessel A = *@vessel_A.domain.com Has smtp relay 1 = a ip adress:25 Server 3 to Vessel A = *@vessel_A.domain.com Has Smtp 2 relay as backup with ipadress and port 20026 If you put the relay settings in sql, you can share it over all 3 servers. Should be possible, maybe there are better ways, but i can't think of one. Greetz Louis > -----Oorspronkelijk bericht----- > Van: De Petter Mattheas [mailto:mattheas.depet...@jandenul.com] > Verzonden: dinsdag 5 februari 2019 9:09 > Aan: L.P.H. van Belle > CC: Postfix users > Onderwerp: RE: multi relay host > > Hello and thanks for the suggestion. > > > The thing is I need this in the transport map, as we have to > do this for each sub domain. > > Vessel A = *@vessel_A.domain.com > Has smtp relay 1 = a ip adress:25 > Has Smtp 2 relay as backup with ipadress and port 20026 > > Vessel b = *@vessel_b.domain.com > Has smtp relay 1 = a different ip adress:25 > Has Smtp 2 relay as backup with ipadress and port 20026 > > > And so on for 90 different sub adresses. > > Any ideas on how to do this? > > > > Met vriendelijke groeten > Kind regards > De Petter Mattheas > Technical support engineer - projects team > IT-Department Jan De Nul Dredging N.V. > T +32 (0)53 73 95 53 > F +32 (0)53 21 00 31 > www.jandenul.com > > > -----Original Message----- > From: L.P.H. van Belle <be...@bazuin.nl> > Sent: 05 February 2019 08:57 > To: De Petter Mattheas <mattheas.depet...@jandenul.com> > Subject: RE: multi relay host > > This works for me. > > http://pjrlost.blogspot.com/2012/11/smtp-delivery-to-two-mail- > servers-via.html > > https://gitlab.dls-belgium.eu/tools/smptdd/tree/develop > > Greetz, > > Lois > > > -----Oorspronkelijk bericht----- > > Van: mattheas.depet...@jandenul.com > > [mailto:owner-postfix-us...@postfix.org] Namens De Petter Mattheas > > Verzonden: dinsdag 5 februari 2019 7:51 > > Aan: Postfix users > > Onderwerp: RE: multi relay host > > > > Helllo > > > > Indeed that's what I meant. > > > > We want smtp 1 = a ip adress: 25, the second a ipadress:20026 > > > > We have to have two routes on the server so we can have a > mail relay > > system. > > > > One route should connect to the vpn and deliver mail that way on > > standard port 25 The second was a ssh with port forwarding, > where we > > give the postfix as smtp route the adress of the ssh server that > > listen on port 20026. > > And in that ssh server there was a port forwarding made with the > > responding smtp server on port 25, so mail could get in. > > > > Do any of you know another program or solution that has this > > functionality? > > > > > > Many thanks > > > > Met vriendelijke groeten Kind regards De Petter Mattheas Technical > > support engineer - projects team IT-Department Jan De Nul Dredging > > N.V. > > T +32 (0)53 73 95 53 F +32 (0)53 21 00 31 www.jandenul.com > > > > > > -----Original Message----- > > From: owner-postfix-us...@postfix.org > > <owner-postfix-us...@postfix.org> On Behalf Of Wietse Venema > > Sent: 04 February 2019 16:53 > > To: Postfix users <postfix-users@postfix.org> > > Subject: Re: multi relay host > > > > De Petter Mattheas: > > > > > > Hello > > > > > > > > > Thanks for the feedback. > > > > > > Can you still help me with the following? > > > > > > We want to have two smtp routes for one subdomain > > > > > > For example > > > > > > *@eqx.vessel.com = smtp 1: a ip adress 25 > > > = smtp 2: a ip adress 20026 > > > > > > *@bqx.vessel.com = smtp 1: a ip adress 25 > > > = smtp 2: a ip adress 20026 > > > > Ehm. 25 is not an IP address. Did you mean TCP port? > > > > Transport maps currently can return only one result. You > can use DNS > > to go from one transport map result to multiple IP addresses, but > > multiple TCP ports. > > > > What you can do is to (also) run an SMTP daemon on port > 20026 on the > > smtp1 host. In Postfix, that means: > > > > /etc/postfix/master.cf: > > 20026 inet .... ... .. .. .. .. smtpd > > > > Wietse > > ************************************************************ > > Any reaction to this e-mail or any other mail, including any files > > transmitted therewith to sender's e-mail address(es) shall be dealt > > with not as private, but as business > > communication(s) and shall be registered as such. > > ************************************************************ > > > > > >
