I have a Domino Server (Hub) that sends its outgoing Internet Email to two SMTP Servers (MX1 and MX2)by doing Round-Robin purpose. In the Router/SMTP configuration document I have configured the entry at ‘Relay host for messages leaving the local Internet domain’ by mx.xxx.com and entried two MX records at interal DNS Server by mx.xxx.com (192.168.0.1) and mx.xxx.com (192.168.0.2) respectively.
I found that the Hub Server is only sending outgoing mail to MX2 SMTP Server only, MX1 never receive any outgoing mail from Hub Server.
When I configured the entry at “Relay host for messages leaving the local internet domain” by pointing either one MX1 or MX2 separately, both of these servers can work properly.
Is it a DNS problem that can’t resolve the mx records or Hub Server problem?
Subject: ‘Relay host for messages leaving the local Internet domain’
I’m not sure what the problem is here, but it seems that you have a couple of things backwards regarding DNS entries.
MX records are used to specify servers that accept incoming mail for an internet domain.
MX records are not used by Domino when sending messages to a relay host. Only the IP address/host name in the field is used as the target server.
Technically, this specific field is not multi-value, so I’d think that only one value can be entered. I don’t know what happens if you add several values.
If you want to run a Round-Robin for these SMTP servers, I suggest you install a DNS that can do a real Round-Robin for them.
Subject: RE: ‘Relay host for messages leaving the local Internet domain’
Hi Peter,
thanks your reply.
I did setup Round-Robin at internal DNS already, because those 2 SMTP Servers were doing Round-Robin already, just don’t know why the one of them couldn’t receive SMTP message from Hub Server (Domino Server).