[SOLVED] Multiple host in transport rule.

[Rode]

Is it possible to add multiple hosts to a transport rule for the same relay domain. This so that we can always put a mail server under maintenance and we do not have to do this manually. Looking at the postfix documentation I see that this is possible.

https://www.postfix.org/transport.5.html

 

[Stoiko Ivanov]

I assume you mean the option to put multiple transports there in a comma-separated list?

My approach to this would be to have a DNS-entry with 2 A records - and have your transport point to that (SMTP and DNS work quite well for load-balancing and fail-over)?

Else: not sure if this would work through the GUI - but you can try - and if this is not possible you can try manually adding it in the config-file (and running postmap) afterwards ...

Let us know how it works out

 

[Rode]

We created 2 DNS a records and that works fine.

 

[CarstenMartens]

We created 2 DNS a records and that works fine.

Can you please explain to me in more detail what you did? We also want to implement this in our system and I haven't found a way around it

 

[Rode]

We created 2 DNS records with the same name, which represents our 2 Exchange servers (smpt.blabla.com 10.10.10.10 and smtp.blabla.com 10.10.10.11). In Proxmox - mail proxy - transports we use the DNS record (smtp.blabla.com) by the host. When 1 of the Exchange servers is down or in maintenance Proxmox uses the other Exchange server.