535: 5.7.0 Denied On 3cx SMTP Server

[TaylorStevens23]

Yesterday around 10:30am EST our 3CX server started failing to send VM emails to our users using the 3CX SMTP Server. We are getting the error 535: 5.7.0 Denied in the logs. I was able to switch over to a custom SMTP setup and the emails for VMs began to work again. We have not changed our IP on the server and I verified our license is active. I verified the FQDN and Public IP return the same expected IP. Then yesterday into today all VM emails showed in the logs "The following error occurred when trying to send an email with subject ‘New Voicemail from XXXXXXXX - XXXXXXXXX’ to ‘XXXXXXX@XXXX’ : 535: 5.7.0 Denied" with the error code 50026. Is there a know issue with the 3CX SMTP Server at the moment?

Appreciate and help/feedback on what may have happened here, thanks!

Details:
On Prem: Yes
Version: Version 20 Update 4 (Build 487 Release)
License: Enterprise Annual

 

[Alphabetic]

Did you come across this?

Thread '5.7.0 Denied -- 3CX SMTP not working'

Dec 20, 2021

Hi, I am having issues with receiving notifications generated by 3CX PBX. A while ago I was able to get daily reports and clients were getting email when their account was created.
Suddenly it stopped working. I have upgraded to v18 but the problem is still present.

I have an annual enterprise license.

Any ideas ?

• UrosK
• Replies: 8
• Forum: Phone System / PBX

 

[TaylorStevens23]

Did you come across this?

Thread '5.7.0 Denied -- 3CX SMTP not working'

Dec 20, 2021

Hi, I am having issues with receiving notifications generated by 3CX PBX. A while ago I was able to get daily reports and clients were getting email when their account was created.
Suddenly it stopped working. I have upgraded to v18 but the problem is still present.

I have an annual enterprise license.

Any ideas ?

• UrosK
• Replies: 8
• Forum: Phone System / PBX

I did but after rereading it, I now do see the machine and the 3cx application public IP do not match. Its been probably almost a year since we had to do an IP switch on this machine so that's odd that the issue just popped up now. I will work to get the 3cx and the linux box on the same public IP. Thank you!