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. 

  • 190 Users Found This Useful
Was this answer helpful?

Related Articles

Mailenable Mailing List Help

Mailing lists are used to create a mail-based forum where messages addressed to the list are...

Configuration of WAP extensions on an IIS web site.

The following link provides information on configuring WAP extensions on an IIS web site:...

Where can I find documentation on VBScript?

Documentation of VBScript as available at: http://msdn.microsoft.com/scripting/default.htm

What is PageCounter and how do I use it?

About Page Counter PageCounter is an object that counts and displays the number of times a Web...

When I connect to my Microsoft Access database, I receive the error message catastrophic failure.

Symptoms I receive an error similar to the following: Provider error '8000ffff' Catastrophic...