Solved

reverse DNS issue

Posted on 2006-11-16
3
185 Views
Last Modified: 2010-03-06
I've started having problems sending mail to companies that rely on the PTR records to qualify email. As an example when we send an email to rr.com we get

<<< 554 #5.5.4 Relaying denied. IP name lookup failed for x.x.x.x

in return. The problem is the address it lists is not the address of my mail server, it is the address of my NAT global address on my PIX. Now obviously anything going out through my pix is supposed to look like a NAT'd address and I would image that could include email.

My question is, am I supposed to have a reverse DNS address listed for my global address, or do you think I have some kind of configuration problem with my exchange server?
0
Comment
Question by:captony
3 Comments
 
LVL 39

Accepted Solution

by:
redseatechnologies earned 125 total points
ID: 17960630
Hi captony,

> am I supposed to have a reverse DNS address listed for my global address

Yes, being NAT, the outside world thinks that IP address is the direct IP Address of your mail server - it must have a PTR record.

Also, RR is one of those "touchy" ISPs (like AOL) so you may also need to create an SMTP Connector for this one domain -> http://www.amset.info/exchange/smtp-connector.asp

Hope that helps,

-red
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Local Continuous Replication is a cost effective and quick way of backing up Exchange server data. The following article describes the steps required to configure Local Continuous Replication. Also, the article tells you how to restore from a backup…
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
how to add IIS SMTP to handle application/Scanner relays into office 365.
This video demonstrates how to sync Microsoft Exchange Public Folders with smartphones using CodeTwo Exchange Sync and Exchange ActiveSync. To learn more about CodeTwo Exchange Sync and download the free trial, go to: http://www.codetwo.com/excha…

896 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

14 Experts available now in Live!

Get 1:1 Help Now