Knowledgebase
550 Access denied - Invalid HELO name - SmarterMail
Posted by Sean Syed on 23 February 2013 05:09 PM

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
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