Solved

HELO test

Posted on 2009-05-12
7
4,720 Views
Last Modified: 2013-11-30
Hello,

We're being told by Senderbase that our HELO doesn't match our PTR record value.

Is there a site where I can see what the HELO string is for our email server?

Thanks in advance,

Steve
0
Comment
Question by:skbohler
7 Comments
 
LVL 70

Accepted Solution

by:
Chris Dent earned 300 total points
ID: 24366281

Hey Steve,

There are a few web-based systems for checking those:

http://www.mxtoolbox.com/

The results are only valid if your server uses the same HELO string for Inbound Mail as Outbound (Exchange 2007, for example, does not).

If you can share the mail system name with us we can possibly tell you exactly where to look.

Chris
0
 
LVL 3

Expert Comment

by:Zoooink
ID: 24366297
check your authentication settings, and\or spam settings
0
 

Author Comment

by:skbohler
ID: 24366468
Thanks for that website.

Where do I find our HELO string mentioned in it (our domain is groupoe.com)?

Steve
0
U.S. Department of Agriculture and Acronis Access

With the new era of mobile computing, smartphones and tablets, wireless communications and cloud services, the USDA sought to take advantage of a mobilized workforce and the blurring lines between personal and corporate computing resources.

 
LVL 65

Assisted Solution

by:Mestha
Mestha earned 200 total points
ID: 24367006
Just telnet in to your server on port 25 and see what it says when you type helo.

telnet server 25

helo

Simon.
0
 
LVL 70

Expert Comment

by:Chris Dent
ID: 24367440

Hey Steve,

For the mxtoolbox, select Diagnostics and pop your mail server name in.

If the outbound server is the same as your inbound server (mail.groupoe.com) then it's fine.

There's a bit of a catch there because this tests the name as if the mail was inbound which doesn't necessarily have to match outbound.

Chris
0
 
LVL 1

Expert Comment

by:greatbay
ID: 34423512
Just telnet in to your server on port 25 and see what it says when you type helo.
This was a good idea.

Senderbase.org said the same thing. "HELO doesn't match our PTR record value.".

It turned out to be our firewall.

Inside the firewall I was getting the following:
220 mail.treadstone.com Treadstone Distrubutors EMAIL Fri, 24 Dec 2010 15:31:14-0500
helo
250 mail.treadstone.com Hello [192.168.1.14]
quit
221 2.0.0 mail.treadstone.com Service closing transmission channel
Connection to host lost.
C:\>

However, outside the firewallI was getting:
220 mail.treadstone.com Service ready
helo testdomain.com
250 Requested mail action okay, completed
quit
221 Closing connection. Good bye.
Connection to host lost.
C:\>

My firewall was set to hide mail server replies to help protect it from attacks. I unchecked it.

Now I'm seeing:
220 mail.treadstone.com Treadstone Distrubutors EMAIL Fri, 24 Dec 2010 16:11:31-0500
helo testdomain.com
250 mail.treadstone.com Hello [210.121.11.143]
quit
221 Closing connection. Good bye.
Connection to host lost.
C:\>
0
 
LVL 1

Expert Comment

by:greatbay
ID: 34430302
Changing my HELO string to match the FQDN did work.

After three days, senderbase upgraded my reputation score to NEUTRAL.

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

Title # Comments Views Activity
How to lock email accounts when notebook stolen 9 70
exchange 2010 server 19 51
unable to download Address Book 21 52
Exchange 2010 DAG 18 60
This short article will present "How to import ICS Calendar onto Office 365 Calendar". I was searching for free (or not free) tools to convert ICS to CSV without success. The only tools I found & working well were online tools...this was too hard to…
New-MailboxSearch Powershell Command and step by step approach to Search and Extract Emails form Exchange 2013 Journaling server.
In this video we show how to create a Contact 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 Recipients >> Contact ta…
To show how to create a transport rule 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 Mail Flow >> Rules tab.:  To cr…

947 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

20 Experts available now in Live!

Get 1:1 Help Now