nha khoa is a group of people who live in many other countries in Asia and interested in Mac product. We always contact with you for the tech support in some Mac problem.

When trying to send email messages in Mail, an alert similar to this may appear:
"Cannot send message using the server example SMTP
The server 'smtp.example.com' cannot be contacted on port 25.
Select a different outgoing mail server from the list below or click Try Later
to leave the message in your Outbox until it can be delivered."

Thanks,
nha khoa