SMTP Relay server issues?

[marinenickel]

I run my own SMTP relay server via docker and use it for BI alerts among others. Wanted to try the detection features on my Dahua cameras (several models), but I'm not able to successfully test the SMTP settings. All I get is failed.
Checked my firewall logs and the camera isn't even trying to reach my server on port 25. Note the camera is on an isolated VLAN.
Does anyone know if local SMPT servers are even supported. I suspect it doesn't like having an IP listed as the SMTP server.

 

[MyDaHua]

For me it work without problems for a long time... more details here.

 

[marinenickel]

I can't even get the test working, no outbound in logs nor in the postfixrelay smtp server.

 

[marinenickel]

Tested with gmail and it works, though that is not my preferred choice.

 

[MyDaHua]

Check if clients from CCTV VLAN can access local SMTP server - send emails, it is a problem of configuration for sure.