Click any of the article links below to read more about the frequently asked questions about Mac Mail and also troubleshooting tips:
If I configure the account as POP, will my Mac Mail pull messages out of my Webmail? How do I Leave a copy of the messages on the server?
There was an update done to my Mac and now my email does not work. The system tells me the SMTP server is offline. What happened?
When I attempt to send a message, the message sits in my Outbox and is listed as unsent. My Outgoing server says it is offline. How do I update my Outgoing Server settings?
How do I switch from POP3 to IMAP if my account is already configured?
I am using IMAP, but not all of my folders are showing. How do I subscribe to all folders?
Please help
Thanks

I didn't find the right solution from the Internet.

References: https://knowledge.web.com/subjects/article/KA-01071/en-us

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