Help! Can't change relay MTA!!

[MobiusNZ]

I'm using my ISP's smtp server as a relay MTA to stop my mail being marked as spam. Previously this has been working fine, but I have changed ISP. When I try and update the relay MTA in the administration console I get the message "Value did not match valid values". It was "smtp.clear.net.nz", and I'm trying to change it to "smtp.orcon.net.nz". Why is this invalid?

[dusty_nz]

Quick guess is on your internal network that FQDN has to resolve to the local MTA boxes IP.

Eg externally that FQDN resolves to your External Firewalls IP
Internally it needs to resolve to the mail server.

[relay23]

I just recently had this problem. "Split DNS" was set up totally fine as was mail flow.. It turned out to be the interface itself that wasn't playing nicely. I'm on Ubuntu Gutsy, which is technically not supported, and have an issue with updating my ssl config files through zmtlsctl as well for probably the same reason.

Anyway, the way I had to force it to use an external MTA is by using the zmprov command.

Example:

sudo -u zimbra ./zmprov ms localhost zimbraMtaRelayHost server70.appriver.com:25

Hope this helps.

[MobiusNZ]

Originally Posted by dusty_nz

Quick guess is on your internal network that FQDN has to resolve to the local MTA boxes IP.

Eg externally that FQDN resolves to your External Firewalls IP
Internally it needs to resolve to the mail server.

No, I'm trying to use my ISP's MTA to stop all my mail being marked as spam (most mail servers block consumer (ie home connection) IPs). The MTA is not within my network.

[relay23]

Yes, I do the same. This is my exact configuration. It is often called a "smart host". To clarify, many mail servers have a problem with MTA's that do not have a pointer record in DNS. AOL and Comcast in the states are famous for this. I figured your issue was that you're not able to change the external mail relay address in the admin GUI. that was my problem before - it wasn't taking so i had to do it via cmd line.