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533 Error "sorry, that domain isn't in my list of allowed rcpthosts" (URGENT)

Hi there,

Today i set up a clients SBS 2003 Server to use SMTP mail instead of collect from pop3 boxes, all the needed A records and MX records are set up but when i send an email to any of the addresses i get the following error:

----------------------
Your message

To: xxx@xxx-xxx.co.uk
Subject: test
Sent: Wed, 13 Apr 2005 16:38:12 +0100

did not reach the following recipient(s):

xxx@xxx-xxx.co.uk on Wed, 13 Apr 2005 16:38:54 +0100
There was a SMTP communication problem with the recipient's email
server. Please contact your system administrator.
<smtp-out6.blueyonder.co.uk #5.5.0 smtp;553 sorry, that domain isn't
in my list of allowed rcpthosts (#5.7.1)>
----------------------

I can supply more information if it is needed.

Thanks!

Craig

gilbertuk

ASKER

Just to add a bit more info, this happens when sending from Blueyonder webmail, and from our companys exchange server. I have not tried anywhere else but as its two servers im guessing its a problem at the clients end!

Craig

Sembee

The sender is blocking your messages.
If it is failing from both Blueyonder and your own server then it sounds like someone has turned their mail filter up too high.

Simon.

gilbertuk

ASKER

Are there any settings in Exchange that would cause it to reject messages? I am just looking through Sophos PureMessage now.

Thanks,

Craig

gilbertuk

ASKER

Right then, i have found something interesting!

I can send a few emails and they will get through no problem, but when i add a few recipients or a few in the cc line the mail bounces back, and all mails for a while after that get bounced back but start working again after an hour or so. I am guessing there is a setting in Exchange somewhere?

Thanks,

Craig

Sembee

This isn't an Exchange setting. That message is being generated by the remote end. The NDR message is not an Exchange message.

Are you sending your email through an SMTP Connector to send via your ISP? If not, then I would suggest that you change. http://www.amset.info/exchange/smtp-connector.asp

What might be happening is that the email is coming from various different servers and only certain servers are in the allowed list. However you aren't going to have much control over this... you need to speak to the remote side. They are the ones with the picky email filter.

Simon.

gilbertuk

ASKER

On the remote site they have the default Exchange setup, as if you had just done a fresh install and ran through the Internet & Email Setup Wizard in SBS2003. The first few emails get through to the server absolutly fine, but others after that get sent back to you. I have disabled Sophos PureMessage and checked on their server (which hosts the domain, although according to a mail trace, it just goes SMTP Server -> Clients Server so that *shouldnt* cause a problem) and they dont have any mail filtering on any other server! Im at a loss with this one!

Craig

ASKER CERTIFIED SOLUTION

Sembee

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gilbertuk

ASKER

Could be! Like i say they have their web server (running BSD) set up extreamly strange, they have other mx records but they dont point to anywhere. When i get into work i will remove the others and see what happens, if not ill move their domain to Zoneedit and give that a try.

Thank you so far Sembee, you have drummed it into me that it IS NOT exchange! Keep up the good work!

Thanks,

Craig

(Will keep updating till i find an answer!)

533 Error &quot;sorry, that domain isn't in my list of allowed rcpthosts&quot; (URGENT)

533 Error "sorry, that domain isn't in my list of allowed rcpthosts" (URGENT)