Sometime you may get the error “Error : Login failed because your username or password was entered incorrectly.”” while accessing horde/squirel mail. You can easily fix this error by following the steps bellow.

1. Set a FQDN hostname like server.abc.com which should have a DNS A entry.
2. Take a backup of /etc/userdomains
3. rm -f /etc/userdomains
4. /scripts/updateuserdomains
or
/usr/local/cpanel/scripts/updateuserdomains –force

The /etc/localdomains file should includes server.abc.com and also abc.com

If you require help, contact SupportPRO Server Admin