Solved

Unable to send domain.

Posted on 2009-07-02
4
1,202 Views
Last Modified: 2013-12-18
We cannot send to this one domain for ours. If an email is sent then and instant email gets returned saying "Delivery has failed to these recipients or distribution lists".
This is also displayed under the email being sent to: Requested #550 5.5.0 Invalid EHLO/HELO domain. ##

A message was sent to the domain in question from a hotmail account and it got through fine.

Can anyone help with this?
0
Comment
Question by:Nomasuras
4 Comments
 
LVL 76

Accepted Solution

by:
Alan Hardisty earned 43 total points
ID: 24770279
Have a read of this article - not the best written article in the world, but it should explain why this might be happening and what to do about it:
http://www.bloggylife.com/2009/05/27/email-error-invalid-ehlohelo-domain/
0
 
LVL 24

Assisted Solution

by:Rajith Enchiparambil
Rajith Enchiparambil earned 41 total points
ID: 24770731
Make sure you have a reverse dns record for your email ip address (MX).

Make sure that the banner matches the MX record url, mail.domain.com

Use http://www.mxtoolbox.com/diagnostic.aspx to check your existing settings.
0
 
LVL 26

Assisted Solution

by:jar3817
jar3817 earned 41 total points
ID: 24772903
"Requested #550 5.5.0 Invalid EHLO/HELO domain"

When SMTP server initially connect, they announce themselves (this is called a HELO) giving the server name, according to the SMTP RFC this address has to be a VALID resolvable DNS names. Most people set this to the same name as their PTR record. Chances are your outgoing server is announcing itself as some internal active directory domain name (exch.yourad.local) or a non-qualified name (exch).

For Sendmail, you just have to edit the /etc/hosts file to change that name.

For Exchange (2003) there is a "fully-qualified domain name" on the advanced section of the delivery tab on the properties for the SMTP virtual server.
0

Featured Post

How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

Join & Write a Comment

Easy CSR creation in Exchange 2007,2010 and 2013
ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
In this video we show how to create an Accepted Domain 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 >> Ac…
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…

707 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

15 Experts available now in Live!

Get 1:1 Help Now