SOLVED Webmail can no longer send emails

[schoeps]

Hello,

Rundown of our problem...

As of this morning, coincinding with a WHM/cPanel upgrade that was run on our servers over night, we are having issues with Webmail making SMTP connections.

Our clients are able to log into Webmail sucessfully, but when attempting to send emails, the following error is generated: "SMTP Error (535): Authentication failed."

It seems that SMTP connections from remote clients (Outlook, GMail, etc) are working fine, but we have been unable to send email from webmail specifically.


Troubleshooting so far...

- We've run a repair of mailbox permissions
- We've manually confirmed correct folder permissions/ownership for entire file paths (/home/username/etc/domain.com, /home/username/mail/domain.com)
- We've ensured correct infomation and formatting in /etc/localdomains
- We've ensured the passwd, quota, and shadow files are present in /home/username/etc/domain.com/ folder
- We've ensured accounts are not suspended
- We've reset the Mail Server

(most of these troubleshooting steps taken from this thread: Urgent: 535 Incorrect authentication data)



Again, this issue is affecting all email accounts, across cPanel accounts, across 2 different servers. And this issue only started this morning, after a WMH update was installed.

Any help will be greatly appreciated!

 

[WietseD]

Dear cPanel,

We are facing the same problems after update 64. The problem appears on all of our servers and all accounts updated to v64 with exactly the same symtoms as "schoeps" mentioned above.

We hope a fix will be available asap.

With kind regards,

WietseD

 

[cPanelMichael]

Hello,

Internal case CPANEL-12280 is open to address an issue where users on systems running cPanel version 64 receive "535 Authentication Failed" error messages when attempting to send email via Horde or Roundcube. I'll update this thread with more information on the status of this case as it becomes available.

As a temporary workaround, try browsing to "WHM >> Service Configuration >> MailServer Configuration" and clicking on "Save Changes" without making any changes to the configuration values to see if that helps address the issue. If that doesn't help, try disabling, then enabling, "PHP-FPM service for cPanel Daemons" in "WHM >> Service Configuration >> Service Manager".

Thank you.

 

[WietseD]

Hello,

Internal case CPANEL-12280 is open to address an issue where users on systems running cPanel version 64 receive "535 Authentication Failed" error messages when attempting to send email via Horde or Roundcube. I'll update this thread with more information on the status of this case as it becomes available.

As a temporary workaround, try browsing to "WHM >> Service Configuration >> MailServer Configuration" and clicking on "Save Changes" without making any changes to the configuration values to see if that helps address the issue. If that doesn't help, try disabling, then enabling, "PHP-FPM service for cPanel Daemons" in "WHM >> Service Configuration >> Service Manager".

Thank you.

Dear Support,

This seems to work as workaround. I hope this will be fixed by a new release.

Thank you for your help.

Best regards,

WietseD

 

[schoeps]

The proposed solution works, thank you very much, you guys are the best!

 

[cPanelMichael]

Hello,

A resolution is now available as part of cPanel 64.0.4:

Fixed case CPANEL-12280: Fix 535 webmail auth fail if /var/cpanel/conf/dovecot missing.

Thanks!