Intermittent Issue with Sending Email Notifications - Error 50026 Connection Timed Out

[Ed Wheeler]

Hi, we recently switched from using Google Apps for a custom SMTP server to 3CX SMTP Server and have been getting intermittent email failures with event id error 50026 - Connection timed out. This is not for everyone, I have sent multiple test emails successfully, we noticed this when we stopped getting successful backup email notifications. I can ping smtp-proxy.3cx.net successfully, albeit with a slightly high response time of 200-230ms and results in a response from xxx.xxx.xxx.xxx.bc.googleusercontent.com. This is a premise/Debian install, v20. Any ideas/suggestions for this?

 

[Phil OE]

I am having the same issue. Im trying to figure this out.

 

[ivank]

Hello, apparently sometimes the mail server is too busy to respond quickly enough.
By default, the SMTP client waits for 15 seconds when establishing the connection.
Try adding SMTP_CONNECT_TIMEOUT in Advanced > Parameters and set it to 60, the value is in seconds.

 

[Phil OE]

I added the timeout will see what happens the next time someone calls 911 and the notification doesnt go out.