message won't open

Hi orlando gigi,

Thank you for participating in the Apple Support Communities. We understand you're unable to open some emails you've received. We recommend checking to make sure your mailbox is online. This article has the steps: If a mailbox is offline in Mail on Mac - Apple Support.

"When an email account is offline, a lightning bolt icon  appears next to the account’s mailboxes in the Mail sidebar and at the end of the Favorites bar.

In the Mail app  on your Mac, do one of the following:

• Take all accounts online: Click the lightning bolt icon or choose Mailbox > Take All Accounts Online.
• Take a specific account online (if you have more than one account): Click the lightning bolt icon next to the account’s mailbox, or choose Mailbox > Online Status > Take [account] Online.

If you can’t take an account online, make sure you’re connected to the internet. If a warning icon appears next to the account name, click it to open Connection Doctor. Learn more about using Connection Doctor.

Some mailbox names can appear dimmed if you don’t have permission to access them, such as public mailboxes on a mail server."

You may also want to try opening your mail while in safe mode which can help isolate the issue. This article has the steps to boot in safe mode if needed: Start up your Mac in safe mode - Apple Support.

If that doesn't help, let us know what happens when you try to open your mail. Do you receive any specific error messages?

Take care.