Server rejected emails

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Joined: Mon Oct 08, 2007 9:56 pm
Location: Victoria, Australia

Server rejected emails

Postby aremdee » Tue Apr 18, 2017 12:52 am

We have one customer who is constantly getting rejections when sending to one particular domain. The error message is "Remote SMTP Server Returned: 550 Your HELO/EHLO must be contain FQDN or literal address(RFC-2821)". The domain is Fully Qualified, DNS setup for email is The only difference is the website itself is on a different server than email so it's A record points to a different IP address. Not sure if this is the issue though. The email hosting is on a Plesk server which also handles DNS. Any tips on where I should start looking to see why they are getting rejection notices? MXToolbox doesn't find any errors either.


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