Solved

DNS Reverse Lookups

Posted on 2012-03-23
3
500 Views
Last Modified: 2012-03-30
I have just set up an SMTP Relay but I think I am having some problems with DNS Reverse Lookups.I can send emails to accounts like gmail or yahoo but when I try to send to more of a private company site the email comes back, Is there a way for me to test this.

Thanks
0
Comment
Question by:ahmad1467
3 Comments
 
LVL 22

Expert Comment

by:chakko
ID: 37758034
is there any error in the returned message?  What is it?

If you are relaying your email then is the relay in your LAN or is it an external relay?
0
 

Author Comment

by:ahmad1467
ID: 37767418
I didn’t get an error but I ran a email address test against the domain and I go this back

220 (my email Server).testmedia.com ESMTP IceWarp 10.3.5; Mon, 26 Mar 2012 13:42:06 -0400

•OK - 201.245.32.3 resolves to 201.245.32.3.ip.(Provider)
•Warning - Reverse DNS does not match SMTP Banner
•Does not support TLS.
•0 seconds - Good on Connection time

The relay is on my LAN but on a different subnet, al so I have tried to send to my internal email
0
 
LVL 26

Accepted Solution

by:
DrDave242 earned 500 total points
ID: 37767743
According to that error, the name that your mail server uses to identify itself when someone connects (the SMTP banner) doesn't match the name in your public reverse-lookup (PTR) record.  Telnet to your server on port 25 to see the SMTP banner.  If the name in the banner is the correct public DNS name of your server, then the PTR record will need to be changed.  In order to do that, you'll need to contact your ISP, as they're responsible for your IP range and thus the PTR record as well.  They will need your server's public DNS name and public IP address to create/correct the record.
0

Featured Post

DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

Question has a verified solution.

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

Import PST to Exchange using Power Shell new-mailboximportrequest command, you can simply import the PST file into Exchange mailbox or archived. To know How to import PST into Exchange  2013 read the complete article.
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…
Familiarize people with the process of utilizing SQL Server views from within Microsoft Access. Microsoft Access is a very powerful client/server development tool. One of the SQL Server objects that you can interact with from within Microsoft Access…
To show how to generate a certificate request in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.:  First we need to log into the Exchange Admin Center. Navigate to the Servers >> Certificates…

777 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