Two possibilities. Do you have multiple accounts? You are sending from
pipex.com and trying to go through tiscali. This is a generic Relay Not
Allowed message. See:
http://www.insideoe.com/problems/errors.htm#relay550

Also check your accounts settings and make sure they haven't been changed to
either Localhost, or 127.0.0.1.
--
Bruce Hagen
MS MVP - Outlook Express
~IB-CA~

"Axel" wrote in message
...
Out of the blue I now cannot send emails and get the following message:

The message could not be sent because one of the recipients was rejected
by the server. The rejected e-mail address was '.
Subject 'Troubleshooting - Easydrive & Motorola V545', Account:
'pop.tiscali.co.uk', Server: 'smtp.dsl.pipex.com', Protocol: SMTP, Server
Response: '554 : Relay access denied', Port: 25,
Secure(SSL): No, Server Error: 554, Error Number: 0x800CCC79

Can anyone help?

Axel