Can´t send mail got this error: 5.5.0 smtp;573

Hi,
Mail server: win2003 std, exchange 2003

When i try to send and recive mail to an mail server @swipnet.se i got this error:

 xxx@swipnet.se på 2007-07-27 10:50
  There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
  <Mailserver.domain.local #5.5.0 smtp;573 Administrator@company.se unknown user account>

I can send to other domains, and i recive mail from other domains


thanks
Håkan
nvadminAsked:
Who is Participating?
 
Chris DentPowerShell DeveloperCommented:

The error above isn't your problem, they're rejecting your mail.

What do they get when they send mail to your domain? Presumably they get a bounce message?

Chris
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Chris DentPowerShell DeveloperCommented:

If that isn't your domain then it's not your problem. The sender should contact the recipient by other means and get their IT department to trace it.

Chris
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nvadminAuthor Commented:
The domain we send from is our domain, and the domain we send to is a third part mail company. the problem is that they can`t send mail to our domain. so its a 2way problem

håkan
0
 
nvadminAuthor Commented:
But when they send mail to our domain i got this error message:

"Det gick inte att skicka meddelandet på grund av att servern inte godkände en av mottagarna. Serversvar: 550 jonny.jacobsson@xxx.se unknown user account.
(konto:rufus.swip.net, smtp.server: mail.tele2.se, Felnummer: 0x800ccc79)."

//
håkan
 
0
 
Chris DentPowerShell DeveloperCommented:

Sorry for the long wait for a reply, I've been moving house.

Do you have an anti-spam filter or anything? Unknown User Account would suggest that you have something performing recipient filtering for inbound e-mail.

Chris
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