2 Mailservers behind Watchguard ...

NDzubiel

Hello @all,

I configured two mail servers according to this example:

https://www.watchguard.com/help/docs/help-center/en-US/Content/en-US/Fireware/configuration_examples/nat_1-to-1_config_example.html

I can send/receive E-Mails from both servers e.g. to Outlook365 ...

But if I try to send a mail from Mail Server A to B - the mail server B cannot connect to the mail server A because it's connecting with the internal IP of the Watchgard - in this case 10.42.42.10 ... I thought it would connect with the external IP ?

So what do I have to do that this works ? I tried to set the trusted flag to the SMTP connection of server A - I can connect - but the spam filter does not accent connections from 10.42.43.10 ... allowing this would create security problems -

so what can I do ?

Thank you for help.

Nils

shaazaminator

Try creating a NAT Loopback policy and see if it works for you.

https://www.watchguard.com/help/docs/help-center/en-US/Content/en-US/Fireware/nat/nat_loopback_static_c.html