"Could not find mail server for domain" message in my SMTP debug log


SYMPTOMS

"Could not find mail server for domain" message in the SMTP debug log

CAUSE

Possible causes are:

  • A firewall is preventing access to this server
  • Ensure that the server that is sending is not registered on any black-lists (see www.dnsreport.com and www.dnsstuff.com)
  • Verify that a PTR record is defined for IP Address that mail is being sent from. Some servers will refuse connection if there is no PTR record defined.

RESOLUTION

The resolution for each of the abovementioned possible causes are as follows:

MORE INFORMATION

DNS Records to create when hosting mail domains: Article ME020048

How to set up PTR records under Microsoft's DNS Server: Article ME020115

How do other mail servers learn about my newly installed mail server?: Article ME020019

MailEnable DNS diagnostic tool: http://www.mailenable.com/tools/memaillookup.asp



Product:MailEnable (All Versions)
Category:Environment
Article:ME020131
Module:SMTP
Keywords:PTR,firewall,SMTP,could,not,find,mail,server,for,domain,unable,to,send
Class:ERR: Product Error
Created:10/06/2003 5:21:00 PM
Revised:Wednesday, May 4, 2016
Author:
Publisher:MailEnable