DNS Reverse Lookup Failed

Error:  Task 'me@mydomain.com ' Sending reported error: 'The server responded: 550 This system is configured to reject mail from 999.999.999.999 [999.999.999.999] (DNS reverse lookup failed)'

Description: You receive this error message when attempting to send mail through the Host Depot Email servers. The Host Depot email servers use Reverse DNS lookups to verify the sender.  This helps with the amount of SPAM allowed in.  

Solution: What you need to do is talk to the entity responsible for maintaining your public DNS.  This is normally your ISP.  What you want in the public DNS is a PTR record.  This associates your public IP address  with a FQDN.  You want the domain name portion of the FQDN to match what your sending SMTP addresses contain. 

  • 269 Users Found This Useful
Was this answer helpful?

Related Articles

What does the Attachments feature in Webmail do?

The forbidden attachments feature allows you to block attachments by selecting a preconfigured...

Terminal Server Has Exceeded the Maximum Number of Allowed Connections

Command Line Hack for: "Terminal Server Has Exceeded the Maximum Number of Allowed Connections"...

When I try to display or assign a variable to an SQL Server database column of data type text, I receive an error message. Why?

SQL Server database columns of data type text are BLOBs (Binary Large OBjects). Unlike char and...

How to backup your mysql database

To backup your database, log into the siteutil panel, (http://www.siteutil.com), select the...

How to FTP using Internet Explorer

To FTP a file from your local computer to your website, you may utilize an FTP program such as...