exim 550 relay not permitted Webuzo Squirrel Fix

exim 550 relay not permitted error can be happened when you set squirrel mail config wrong , especially if you set 'localhost' as imap / smtp server.
Solution: edit config.php to be your true dns host domain.

Change SQUIRREL MAIL CONFIG:
/home/soft/www/squirrelmail/config/config.php

edit :

to become :

$smtpServerAddress = 'smtp.yourdomain.com';
$smtpPort = 25;
$use_smtp_tls = false;
$smtp_auth_mech = 'none';
$smtp_sitewide_user = '';
$smtp_sitewide_pass = '';
$pop_before_smtp = false;
$pop_before_smtp_host = '';

$imapServerAddress = 'imap.yourdomain.com';
$imapPort = 143;
$imap_server_type = 'dovecot';
$use_imap_tls = false;
$imap_auth_mech = 'login';

Then check your DNS entry for your main domain.

should  have:

imap 14400 IN A 192.6.162.148

smtp 14400 IN A 192.6.162.148

whereas 192.6.162.148 is your public ip of your vps.

Also, set Email Settings in Webuzo admin interface to use Exim smtp server

username: arealuseraccount@yourdomain.com

password: 12345678

port: 25

host: smtp.yourdomain.com

Webuzo Squirrel Mail, Exim and Dovecot Problem Fix

Webuzo Free Control Panel Notes.

Create a new email user first.

Squirrel Mail , try not using https first.
If you can not login, try to check dovecot was installed or not. If Dovecot was installed, but still can not login, try to add new DNS Zone records like this:

imap 14400 IN A 192.3.111.111
smtp 14400 IN A 192.3.111.111

save and restart named and dovecot services.

You should be able to login to Squirrel now.

Try to test sending a mail, to outside domain's mail and cc to  your email too.

If you get error SMTP, SMTP server in webuzo use Exim.

Set the Email Settings menu in webuzo admin first. Use SMTP , not PHP Mail. Guides here: http://webuzo.com/wiki/Add_Email_Account

In SMTP setting:
set them like this:
username:you@yourdomain.com  that you have created before
password:the password of  you@yourdomain.com  that you have created before
port:25
host:localhost

shoot a test mail again from inside of squirrel mail. Should have done now.

This is just a quick note when I try to install webuzo in centos 6 x64. Sorry I can not write better.
If you any questions, feel free to ask me here.