Emails being rejected
I have an issue with my install, I have everything up following the Debian 4.0 instructions and all seems ok. I have setup a website/ftp access etc all ok, I have then setup a mail domain and a mailbox.
I can access this remotly via Pop and Imap ok and see the welcome message
however when I send emails to this mailbox I get it returned with:
The following message to <firstname.lastname@example.org> was undeliverable.
The reason for the problem:
5.1.0 - Unknown address error 550-'sorry, mail to that recipient is not accepted (#5.7.1)'
Reporting-MTA: dns; smtpout.karoo.kcom.com
Status: 5.0.0 (permanent failure)
Remote-MTA: dns; [18.104.22.168]
Diagnostic-Code: smtp; 5.1.0 - Unknown address error 550-'sorry, mail to that recipient is not accepted (#5.7.1)' (delivery attempts: 0)
Any help would be great as I am now lost!