Outlook 2007: Undeliverable, 550 RCPT Restricted Relay - relaying

G

Gab-CH

Hi friends,
I've just installed Vista with Office Outlook 2007, and adapted my account
settings to new mail login (changed Outgoing Server from mail.bluewin.ch to
smtpauth.bluewin.ch; then checked "My outgoing server requires
authentication; finally changed Outgoing Server (SMTP) from 25 to 587. I did
this otherwise I couldn't send mails)
Now I can send mails but majority of them come back as "Undeliverable" 550
RCPT, Restricted relay - relaying not allowed.
Does anyone know how to fix this?
Thank you very much.
 

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