multiple relays

felipe

Active Member
Oct 28, 2013
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38
Hello, it seems that relaying the mails via round robin to multiple servers (exchange cluster) is not possible at the moment?
 

Stoiko Ivanov

Proxmox Staff Member
Staff member
May 2, 2018
7,195
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Depends - you can do that with DNS records:
pick a name in your domain (relay.mydomain.com)
add each exchange's IP as A record to relay.mydomain.com
-> relay mails to relay.mydomain.com

I hope this helps!
 

felipe

Active Member
Oct 28, 2013
221
6
38
Dns round robin: I could try.. but we use internal ips. It is still possible though. But i dont know how good it works if a node goes down. maybe we user the loadbalancer for this. Mailcleaner had the option to do this. But anyway we will try a different approach.
So it would be the default relay ? And if we want to user extern Mailservers on local sites we go with transports right?
 

Stoiko Ivanov

Proxmox Staff Member
Staff member
May 2, 2018
7,195
1,132
164
But i dont know how good it works if a node goes down.
In my experience DNS round robin works quite well in the SMTP case - I would suggest you try it :)
And if we want to user extern Mailservers on local sites we go with transports right?
Not quite sure if I understand the question completely - if not please explain some more
but you use transports to override the 'default relay' for certain relay domains.
so if you set your default relay to main.server.com, and have 2 domains 'a.com' and 'b.com' configured as relay domains:
* if you create a transport entry for b.com pointing to second.server.com - mails for xxx@b.com would get sent to second.server.com
* mails to xxx@a.com would get sent to main.server.com (since it's the default relay)

I hope this explains it!
 

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