SMTP Authentication issue

Authentication

Some ISPs do authentication of email coming through in order to avoid spamming. Then you have to provide your ISP with sufficient information.

1. Go to Mail Server->Advanced tab window

2. Enter desired host name into the Internet host name field. Usually this is the name of the computer connected to the Internet, e.g. host.isp.com.

mailhost

If a user name and password are required you can only add these settings through the registry. Go to Hkey_Local_Machine/Software/kerio/winroute. Modify MailRelayAuth to '1' and MailRelayUser and MailRelayPassword to reflect the sufficient login information required by your ISP.