/usr/local/cpanel/bin/update-horde --force

Horde shows:
There was an error sending your message: Failed to add recipient: recipient@targetrecipient.com [SMTP: Invalid response code received from server (code: 550, response: Verification failed for No Such User Here" Sender verify failed)]

/var/log/exim_mainlog shows:
2010-03-28 18:47:46 H=localhost (userdomain.com) [127.0.0.1] sender verify fail for : No Such User Here"
2010-03-28 18:47:46 H=localhost (userdomain.com) [127.0.0.1] F= rejected RCPT : Sender verify failed

99.99999% of the time, you’ll see this issue when the Default Address is set to “fail”, making it unrouteable. In cPanel > Default Account, set the catch-all account to forward to another email address, and you’ll be all set.

# cat /etc/valiases/userdomain.com
*: ":fail: No Such User Here"

Such a setting would tell the server that the account doesn’t exist, causing the Sender Verify error.

root@servername [/home]# authtest -s imap test@normaldomain.info password
Authentication succeeded.

Authenticated: test@normaldomain.info (system username: normaldo)
Home Directory: /home/normaldo/mail/normaldomain.info/test
Maildir: /home/normaldo/mail/normaldomain.info/test
Quota: 262144000S
Encrypted Password: $1$KHntyoqN$wih5o0N7ZTf6Fm4vasrxj.
Cleartext Password: password
Options: (none)

FOR MY PROBLEMATIC DOMAIN:::

root@servername [/home]# authtest -s imap info@problemdomain.info password
Authentication FAILED: Operation not permitted

What you want to do next is check /usr/local/cpanel/logs/login_log to see what the exact issue is. In my circumstance, I received this error:

208.74.121.102 - info@jurnamakelaars.nl [10/04/2009:14:37:11 -0000] "POST /login/ HTTP/1.1" FAILED LOGIN webmaild: user password hash is missing from system (user probably does not exist)

I then checked the user’s shadow file in /home/USERNAME/etc/domain.com/shadow and saw that it was corrupt. I removed the file, created a new one, and applied user:mail permissions. I then created a new email account, then copied the user’s encrypted password after making entries in shadow for the existing users. I was then able to login to each webmail account without issue.

If you see a line like:

208.74.121.102 - name@domain.com [10/01/2009:17:21:12 -0000] "POST
/login/ HTTP/1.1" FAILED LOGIN webmaild: user password hash is missing
from system (user probably does not exist)

Check /home/USER/etc/DOMAIN/shadow to make sure that the webmail user is listed there. If not, copy one of the lines, change the username, and reset the password via cPanel.

If you are using the Turkish language in Horde, you may want to utilize English, if at all possible, due to a bug in PHP 5.2 which will not be resolved until PHP 6.

http://bugs.php.net/bug.php?id=35050


[30-Jan-2009 14:07:11] Invalid response code received from server (421):
[30-Jan-2009 14:07:11] Invalid response code received from server (-1):
[30-Jan-2009 14:07:34 -0800] SMTP Error: SMTP error: Authentication failure: STARTTLS failed (Code: ) in /usr/local/cpanel/base/3rdparty/roundcube/program/steps/mail/func.inc on line 1248 (POST /3rdparty/roundcube/index.php?_task=mail&_action=send)
[30-Jan-2009 14:10:29] STARTTLS failed ():


Then there is an issue with the most recent Net-SMTP PHP module. To resolve this, edit the following file:


/usr/local/cpanel/base/3rdparty/roundcube/config/main.inc.php

and change

// SMTP username (if required) if you use %u as the username RoundCube
// will use the current username for login
$rcmail_config['smtp_user'] = '%u';

to this:


// SMTP username (if required) if you use %u as the username RoundCube
// will use the current username for login
$rcmail_config['smtp_user'] = '';