Solved

sending emails - "Your server announcement looks like a dhcp pool allocation"

Posted on 2006-11-21
3
449 Views
Last Modified: 2008-01-09
Hi,

We send our emails through a dedicated hosting solution. This means our server calls itself 123-123-123-123.dedserver.net instead of mail.mycompany.com, when smtp'ing to another server.

Usually fine - but emails to one particular domain (*@optus.com.au) fail consistently. They bounce back with the following error. I've emailed postmaster@optus.com.au as instructed but not holding my breath.

Can you advise if this is a problem my end? I wonder if their mail server is trying to do a reverse DNS lookup or something. But we can email other domains without drama.

=======================

Hi. This is the qmail-send program at 123-123-123-123.dedsvrs.net.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

<Russell.Johnstone@optus.com.au>:
203.13.126.131 does not like recipient.
Remote host said: 554 5.7.1 <123-123-123-123.dedsvrs.net>: Helo command
rejected: Your server announcement looks like a dhcp pool allocation.  Mail postmaster@optus.com.au for more information.
Giving up on 203.13.126.131.

0
Comment
Question by:blowfly
  • 2
3 Comments
 
LVL 26

Accepted Solution

by:
jar3817 earned 500 total points
ID: 17996081
The error says something about the server announcement, which happens when it first connects in SMTP, it'll say "EHLO 123-123-123-123.dedserver.com". This is probably where it's failing. Some email admins (myself included) filter based on the reverse dns (and corrisponding forward dns), announcement hostnames and lots of other stuff to detect spam. The 123-123-123-123.dedserver.com format is very similar to dialup/cable/dsl generic reverse dns (having the ip either in dotted or dashed form (forward or reverse) within the hostname. The best thing to do would be to change the reverse dns to a real hostname, or at least something that doesn't look so generic. The idea is that legit servers that send out email will have specific hostnames so you know what they are (mail.whereever.com, smtp3.whereever.com), mail coming from  a generic hostname looks like (to some quick and dirty spam filters) a compromised machine that is pumping out spam.

0
 
LVL 26

Expert Comment

by:jar3817
ID: 17996114
and...
when and if you change the reverse dns, also make sure the smtp announcement changes too. You can usually override that, but you didn't mention what mail server software you're using.
0
 

Author Comment

by:blowfly
ID: 18001133
FYi I got a reply from postmaster and they ended up whitelisting us. Looks like they thought we were spammers due to the xxx-xxx-xxx-xxx.blah.com introduction so yes, changing that introduction is a priority now. We're following up with our ISP abotu how to change it.
0

Featured Post

Salesforce Made Easy to Use

On-screen guidance at the moment of need enables you & your employees to focus on the core, you can now boost your adoption rates swiftly and simply with one easy tool.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Office 365 6 71
Windows Mail to Outlook 2016 7 103
Spam invasion 8 70
changing email : how to reload all of my data from Yahoo mail to Gmail 4 106
Microsoft Outlook provides an easy way to recover permanently deleted items. When you empty the Deleted Items or simply deleted an Outlook data items using shift+Del key then it can be recovered using Registry Key settings.  Caution- Wrong Registry…
Phishing attempts can come in all forms, shapes and sizes. No matter how familiar you think you are with them, always remember to take extra precaution when opening an email with attachments or links.
The purpose of this video is to demonstrate how to set up a Mailchimp campaign. This will include styling and adding elements to a newsletter/email. This will be demonstrated using a Windows 8 PC. Mailchimp will be used. Log into your Mailchim…
Internet Business Fax to Email Made Easy - With  eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, f…

820 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