my computer is windows 7 pro. please see below
The following message to [email protected]> was undeliverable.
The reason for the problem:
5.1.0 - Unknown address error 550-'5.7.1 Recipient not authorized, your IP has been found on a block list'
I can send emails to everyone but this. How can I UNBLOCK my IP ?
contact your isp
"How can I UNBLOCK my IP ?"
Turn your router off then on again and you'll get a different IP address which'll hopefully fix your problem.
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