Mail Unable To Send Emails.
I am unable to send emails through my Mail accounts. I have a 2017 MacBook Pro running Big Sur Version 11.4. The progress bar indicates that the email is progressing but times out before sending.
MacBook Pro
If you can’t send or receive email on your Mac
Also, does the e-mail have a file attachment larger than 20 MB. iCloud mail, from experience only, has limitation of e-mail size of about 20 MB. If yes, the message may not be sent or may offer to send a Link for said attachment.