Multiple destination server

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Sander81
Posts: 2
Joined: 05 Apr 2017 16:46

Multiple destination server

Post by Sander81 » 27 Dec 2017 10:36

Dear all,
Is it possible to set up multiple destination server on transport setting for a domain?
I need to set something like:
Domain.com -> 1.1.1.1
Domain.com -> 1.1.1.2
So if the server 1.1.1.1 is down, mails are delivered to 1.1.1.2

Thank you

thewomble
Posts: 44
Joined: 17 Jan 2017 12:52

Re: Multiple destination server

Post by thewomble » 03 Jan 2018 16:02

example.com :[gateway.example.com]

where gateway.example.com would two A records 1.1.1.1 and 1.1.1.2 it would round rob, so send to both.

or use load balancer for sending to 1.1.1.1 and 1.1.1.2 if the first is not available, do not think this logic is available in postfix.

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pdwalker
Posts: 1212
Joined: 18 Mar 2015 09:16

Re: Multiple destination server

Post by pdwalker » 04 Jan 2018 06:36

What thewomble says. RRDNS or a single ip served by a load balancer.

If you’re really paranoid, you can have multiple, load balanced ips from multiple load balancers, but the I’ve never had a use case for this with email.

What exactly is the problem you are trying to solve/avoid?

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