Webmail Authentication Fails – cPanel

You know you’re using the right password, so why can’t you log into Webmail? One common issue users see on...

You know you’re using the right password, so why can’t you log into Webmail? One common issue users see on courier-IMAP systems when trying to log into Horde is:

Notice: (null)(): Retrying LOGIN authentication after AUTHENTICATE LOGIN failed (errflg=1) in Unknown on line 0

Notice: (null)(): Retrying LOGIN authentication after AUTHENTICATE LOGIN failed (errflg=1) in Unknown on line 0

Notice: (null)(): Can not authenticate to IMAP server: AUTHENTICATE LOGIN failed (errflg=2) in Unknown on line 0

To rule out a service failure, restart both cPanel and courier-imap:

/etc/init.d/courier-imap restart

service cpanel restart

The fix that works 98% of the time is to run these commands:

mv /etc/vmail /etc/vmail.bak

/scripts/updateuserdomains

If that doesn’t correct the error, in some cases running a courier update has corrected the issue:

/scripts/courierup –force

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