Solved

Emails getting marked as spam when sending to certain domains

Posted on 2008-06-16
13
241 Views
Last Modified: 2013-11-30
Experts,
We have just built a new Exim SMTP server, registered an mx record setup rDNS and a A record for our domain  but certain mail servers are marking our messages as spam...

Cant see where we are going wrong.

DNS details:
(A) mail.citizen.net.au > 203.35.237.92
(MX)  citizen.net.au > mail.citizen.net.au
(PTR) 203.35.237.92 > mail.citizen.net.au

Also im pretty sure our SMTP greetong is set to maxmailproxy.citizen.net.au - when i telnet to 25 internally i get what looks like the correct greetiog, but from external its just a bunch of ************** - which i think was done for security reasons??? does that matter?

what am i missing?
0
Comment
Question by:theoaks
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 6
  • 6
13 Comments
 
LVL 71

Expert Comment

by:Chris Dent
ID: 21792178

Hey,

Yeah it does matter.

It suggests something like a Cisco PIX is performing ESMTP Inspection (replaces unsupported / illegal commands with ***). Disable that and you should have less of a problem getting caught as spam.

SMTP servers need to pass properly formatted banners to pass reverse checking.

HTH

Chris
0
 
LVL 5

Author Comment

by:theoaks
ID: 21792246
Done removed esmtp from the pix, i am getting a greetong externally but still getting marked a spam sending to yahoo and hotmail.
0
 
LVL 71

Expert Comment

by:Chris Dent
ID: 21792291

Those might take a while to think about things if you've only just changed it. They tend to cache a lot of information.

I take it you're getting the message rejected during the SMTP conversation rather than it just being dropped in Junk Mail (or whatever it's called on those two)?

Chris
0
Raise the IQ of Your IT Alerts

From IT major incidents to manufacturing line slowdowns, every business process generates insights that need to reach the people required to take action. You need a platform that integrates with your business tools to create fully enabled DevOps toolchains.

You need xMatters.

 
LVL 5

Author Comment

by:theoaks
ID: 21792308
no its not being rejected, just dropped in there spam folders.

Thanks for your help
0
 
LVL 71

Expert Comment

by:Chris Dent
ID: 21792335

That's going to make it more complex then. It may improve if your server is now passing a banner correctly, but it's decisions there aren't as clear cut.

I take it the content of the message was just text, and excessively simple?

To be honest, I'd give it a couple of days and see if the matter improves. AOL, Hotmail and such all take a few days to think about things again following a change.

If it doesn't work you can raise it with each organisation individually. Hotmail have a (long) form you can fill in to work through it.

Chris
0
 
LVL 5

Author Comment

by:theoaks
ID: 21792360
ok ill wait for the changesand see how that goes.

is the mx record necessary would you say? or can we get away with just a rDnS entry?
0
 
LVL 71

Expert Comment

by:Chris Dent
ID: 21792492

You need the MX record if you expect to receive mail for the domain :)

RDNS is only used when you're sending out mail (when your SMTP server attempts to deliver to others).

Chris
0
 
LVL 5

Author Comment

by:theoaks
ID: 21792505
Its only being used for outgoing.

Thanks
0
 
LVL 71

Expert Comment

by:Chris Dent
ID: 21792519

Ahh okay, in that case you won't need the MX, although it would help for receipt of Non-Delivery Reports (if you need them).

Chris
0
 
LVL 5

Author Comment

by:theoaks
ID: 21843631
Can anyone else shed any light on this... we are still getting marked as spam going to yahoo and hotmail.

Thanks
0
 
LVL 71

Accepted Solution

by:
Chris Dent earned 500 total points
ID: 21844392

Start with Hotmail and see what they say:

http://postmaster.msn.com/Troubleshooting.aspx

Eventually you should get to this link:

https://support.msn.com/eform.aspx?productKey=edfsmsbl&ct=eformts

Chris
0
 
LVL 5

Author Comment

by:theoaks
ID: 21864552
i have filled out the forms at yahoo and hotmail. lets see what happens
0

Featured Post

The Ultimate Checklist to Optimize Your Website

Websites are getting bigger and complicated by the day. Video, images, custom fonts are all great for showcasing your product/service. But the price to pay in terms of reduced page load times and ultimately, decreased sales, can lead to some difficult decisions about what to cut.

Question has a verified solution.

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

New-MailboxSearch Powershell Command and step by step approach to Search and Extract Emails form Exchange 2013 Journaling server.
This article outlines some of the reasons why an email message gets flagged as spam on a recipient's end.
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…
In this Micro Video tutorial you will learn the basics about Database Availability Groups and How to configure one using a live Exchange Server Environment. The video tutorial explains the basics of the Exchange server Database Availability grou…

687 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