Can not connect to SMTP after upgrade

[m107]

Hi,
I have been using this SMTP for a quite long time but suddenly it stopped working after I upgraded to the latest version, 7.3 I suppose.

What I did:
1- Resting the SMTP password
2- Changing the SMTP server
3- Changing the port

None of above worked. So I re-uploaded the WHMCS files and disabled addons, not fixed. I followed the steps for SMTP troubleshooting, but did not help at all.
I also checked the firewall both at my website server and at the SMTP host, there is no problem with them.

I opened a ticket 8 hours ego and still no reply.

[WHMCS John]

Hi,

Please enable the smtp_debug option in your configuration.php file, and post the output here for us to review:

https://docs.whmcs.com/Email_Sending_Issues#Troubleshooting

 

[mustardman]

On 10/3/2017 at 10:36 PM, m107 said:

Hi,
I have been using this SMTP for a quite long time but suddenly it stopped working after I upgraded to the latest version, 7.3 I suppose.

What I did:
1- Resting the SMTP password
2- Changing the SMTP server
3- Changing the port

None of above worked. So I re-uploaded the WHMCS files and disabled addons, not fixed. I followed the steps for SMTP troubleshooting, but did not help at all.
I also checked the firewall both at my website server and at the SMTP host, there is no problem with them.

I opened a ticket 8 hours ego and still no reply.

Is this the troubleshooting guide you used?  Did you check your email piping cron as per that guide?

https://docs.whmcs.com/Email_Piping

Edited October 12, 2017 by mustardman