550 Access denied - Invalid HELO name - SmarterMail

When you send an email through SmarterMail, you receive following error in bounc back email.

Remote host said: 550 Access denied - Invalid HELO name (See RFC2821 4.1.1.1)

Soltution:

• Login as admin
• Settings/General Settings/Server Info
• Set the hostname to 'mailserver.mydomain.xxx'
• Point an A record of 'server1' to the ip of your server
• Create a Reverse DNS PTR record for the server ip to resolve back to mailserver.mydomain.xxx