[SOLVED] Unable to Send mail but can receive


Renowned Member
Aug 25, 2018
I have setup PMG and currently, have a domain configured (techbehave.com) with GoDaddy with the following records.
A -> @ -> Public IP Address
A -> * -> Public IP Address

MX -> mail.techbehave.com -> 10
MX -> mail.techbehave.com -> 20

I then have my PFSense firewall configured to port forward port 25 to PMG which is at I have a Modoboa email server running (I have also tried with mailcow) at which is set in PMG at the transport for the techbehave.com domain. I can send a test email to myself from is my email working and I received the email but when I try and reply the email is sent to PMG which is both test email server was set to send all mail to PMG. The email is accepted by PMG but then deferred saying that techbehaved.com (Public IP:25) timed out

I am clearly missing something on the PMG side but not sure what it is. If you need more details please let me know, I have been working to get an email server up for the last 2 days now and not sure what else to try.
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A follow up to this is that I can send email to a domain that is not managed by PMG such as a shaw email address. Is there something I have to do to have it work with domains that are passing through PMG?
I am not sure what changed between my testing setup on Virtualbox and my production install on ProxmoxVE but everything is working now.


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