"5.7.1 Access denied" errors

[Thilton]

Hello All,

Need some direction. My client is having problems sending emails to their customer in Switzerland. they get the following email in reply.

> -----Original Message-----
> From: System Administrator
> Sent: Friday, February 13, 2004 3:26 PM
> To: 'user@domain.ch'
> Subject: Undeliverable: Friction testing of Socks
>
> Your message did not reach some or all of the intended recipients.
>
> Subject: Friction testing of Socks
> Sent: 2/13/2004 3:26 PM
>
> The following recipient(s) could not be reached:
>
> 'user@domain.ch' on 2/13/2004 3:26 PM
> You do not have permission to send to this recipient. For assistance, contact your system administrator.
> <mail.domain.com #5.7.1 smtp;550 5.7.1 Access denied>

THe client only has problems with this Swizz domain, everything else works just fine. I've been searching the MSKB but not finding what I'm looking for. Do I need to create a SMTP connection specifically for this Swiss domain? Any thoughts on cause of the problem?

 

[zoeythecat]

Could be this domain is blocking mail from this recipient. They could have some spam filtering software that is blocking this user for some reason. Have you tried sending a test email message to this customer in Switzerland? You may need to contact them to have them taken off of their blacklist.

 

[Thilton]

Hey zoeythecat,

Thanks for the quick response. Is this error indicative of spam blocks or blacklists replies with Exchange servers or emails?

 

[zoeythecat]

Yes....If your server is compromised somehow and is being used as an open relay you can end up being blacklisted from several domains (this happened to me some time ago). In your example its probably not the case because it is just one domain. This type of error can be indicative of a spam block.

 

[Thilton]

OK. Thanks again.

 

[dforney]

Check this out in the meantime.

http://www.microsoft.com/exchange/techinfo/tips/Trblsht_Tip01.asp

Also you can narrow the 5.7.1 NDR by seeing if there are entries in the event log associated with this.