553 sorry, that domain isn't in my list of allowed rcpthosts (#5.

[Guest]

I'm trying to send an e-mail to a yahoo.co.uk address but I get the following
message :-
Your message did not reach some or all of the intended recipients.

Subject: Hi
Sent: 04/11/2005 20:37

The following recipient(s) could not be reached:

'Emma Westwood' on 04/11/2005 20:37
553 sorry, that domain isn't in my list of allowed rcpthosts
(#5.7.1)

What's likely to be causing this?

Thanks

 

[Vanguard \(NPI\)]

I'm trying to send an e-mail to a yahoo.co.uk address but I get the
following
message :-
Your message did not reach some or all of the intended recipients.

Subject: Hi
Sent: 04/11/2005 20:37

The following recipient(s) could not be reached:

'Emma Westwood' on 04/11/2005 20:37
553 sorry, that domain isn't in my list of allowed rcpthosts
(#5.7.1)

You didn't configure your e-mail account to authenticate to your SMTP
server. Maybe you were trying to use an off-domain SMTP mail server; i.e.,
the SMTP server to which you connected was NOT on the same network as to
which you connected (so try using the ISP's SMTP server to which you
connect).

Or, your ISP is blacklisting that domain and won't send to it.