Emails routed from BTConnect account not being received

[LeonAbena]

Hi

We are having an issue with any business emails sent to us from customers with a BTConnect email account. 

The customer receives a bounce back with error message '

leon@abena.co.uk
The recipient's e-mail address was not found in the recipient's e-mail system. Microsoft Exchange will not try to redeliver this message for you. Please check the e-mail address and try resending this message, or provide the following diagnostic text to your system administrator.

This is my email address and is a valid address on our Exchange server. 

The customer has sent me a copy of the failed email header and it reports as having been rejected by 'hesa05uker.he.local' which I believe to be a BT server.

I've also run a diagnostic on the email header through MXToolBox and it shows the following hops:

1	*	customermail.local	customersmail.local	mapi	8/7/2012 12:07:01 PM
2	1 seconds	host81-137-42-241.in-addr.btopenworld.com 81.137.42.241	c2beaomr09.btconnect.com	ESMTP	8/7/2012 12:07:02 PM
3	*	mail.btconnect.com 10.87.21.73	hesa05uker.he.local	Microsoft SMTPSVC(6.0.3790.4675)	8/7/2012 12:07:01 PM

NB: I've changed the customers actual email in above for security

As you can see from this, the email never reaches our own servers, and is being rejected by BT. 

From the information I can gather, it seems this may be an issue with the BT DNS servers not relaying out mail but treating it as BT email?? 

I've also done a telnet test to check if relay is working on the BT servers, and it doesn't appear to be.

Our mail is on mail.abena.co.uk

If these same customers email to another account eg my personal BTInternet account it works fine, and if they email us from a non-BT account it also works. 

Any help would be much appreciated as this is affecting a number of our customers now. 

Many thanks

Leon

[DaveA]

Hi,

Did it work

/suspense

Dave

[LeonAbena]

Hi Dave

We did get one email today, but waiting on a couple from our bigger customers just to be 100% sure!

I'll keep you posted..... 

Thanks

Leon 

[MHC]

Leon - did my emai get through to you ?    

[LeonAbena]

MHC - Yes it's got throught 

Although for some reason, it got caught in our spam filter 

~Thanks for all your help.

[iptables101]

Hi. What spam filter are you using? Is it a client or just the default filter from your email provider?

When you receive an email from BT, what does the sender's name look like? Maybe add it in your white list? 

[DaveA]

\o/

Win!!

Glad to help.

🙂

Dave

[LeonAbena]

Hi Dave

Thanks for all your help on this.   Still waiting on our customers to actually email us(!) but as got the email from MHC I reckon you've fixed the problem 

Thanks again.

Leon 

[LeonAbena]

Hi IPtable101

We use Untangle, so just added the email address to the safe-list.   Just couldn't understand what in the email triggered the spam filter as it was only a simple 'Hello'!