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!
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!