[Zope] MailHost problems

[Lennart Regebro]

From: "Tony Flanagan" <tony.flanagan@engitech.ie>
> Error Type: SMTPHeloError
> Error Value: (501, 'Invalid domain name')
>
> Does anybody know what causes this. The server name I've used is
correct,and
> I am able to ping it from my NT server.

An SMTPHeloError is what you get when the server doesn't accept your try to
connect.
The 501 error is what the server tells you, so it seems it thinks that the
domain name of the connecting machine is incorrect.