Had a customer with exactly the same problem. Turned out his "identity" was corrupted.
Created a new "identity" for him and Outlook Express work perfectly.
We then imported his address book and all mail from the old (Default) identity and deleted the old
identity.


"benssi claudio" wrote in message
...
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| "Marc" ha scritto nel messaggio
| ...
| Hi, wonder if anyone can help me sort this one out...?;
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| I got the following message when trying to send an email from outlook
| express;
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| The message could not be sent because one of the recipients was rejected
| by the server. The rejected e-mail address was (removed for privacy, it
| doesn't matter what email address i try to send to, same message comes
| up). Subject 'Read: Item number: 150305184567_proof copy enclosed',
| Account: 'imap.1and1.co.uk', Server: 'auth.smtp.1and1.co.uk', Protocol:
| SMTP, Server Response: '550 must be authenticated', Port: 25, Secure(SSL):
| No, Server Error: 550, Error Number: 0x800CCC79
|
|
| thanks for any help
|
| Marc
|
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