They have the mail forwarded from a hosting company to a POP3 mail account, which they currently download from demon using one their ISP logon and password.
I spoke to Demon (their ISP) who said that it was due to e-smith announcing itself as the mail server, then as it wasn't configured, it would reject all mails. They initially thought it was a Windows 2000 server running as they have encountered the same problems with Win2k.
I did set-up seperate accounts orginally on e-smith, but could not get it to distribute mail. I also set-up Outlook 2000 to connect as admin and see if it had passed any mail it couldn't resolve to the admin account, but there was nothing there.
The error we keep getting is:
A message that you sent could not be delivered to all of its recipients.
The following address(es) failed:
netlinedesign.demon.co.uk [194.222.201.89]:
RSET
250 flushed
MAIL FROM:
250 ok
RCPT TO:
553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)
Any suggestions would be hugely, greatly appreciated.