I am unable to send messages from my windows live mail  and keep getting this message:

An unknown error has occurred.

Server: 'mail.optusnet.com.au'
Windows Live Mail Error ID: 0x80070057
Protocol: SMTP
Port: 25
Secure(SSL): No

One of my messages had photos attached and I opened the Windows Live ID and tried to send the messages, but the error still remained. I tried  switching the Protocol SMTP Port from 25 to 587, but still the same.

Does anyone have wisdom to share?

Regards

John Cosstick

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