emails won't send in Vista Business

[Guest]

Using Windows Vista and sending to new recipients (from address book) the
administrator returns the mail with the mess. "that domain isn't on my list
of allowed rcpthosts (#5.7.1)?

 

[Guest]

What version of Microsoft Outlook are you using?

 

[Guest]

Outlook 2003

What version of Microsoft Outlook are you using?

 

[Guest]

The actual explanation of error 5.7.1 is as follows:
Permissions problem. For some reason the sender is not allowed to email
this account. Perhaps an anonymous user is trying to send mail to a
distribution list.
Check SMTP Virtual Server Access Tab. Try checking this box: Allow
computers which successfully authenticate to relay
User may have a manually created email address that does not match a System
Policy.
One question I have to ask is if the error message also contains 550, since
that would indicate the error is coming from your smtp server rather than the
recipient's server.

 

[Guest]

The reply from system administrator quotes 553 in front of all replies
related to this problem

 

[Guest]

There's no special character in the user's name, as you would see in O'Brien
or O'Connor for example?