My email quit unexpectedly yesterday and I lost most of my emails. They are no longer on my laptop or my iPhone.

Lsearching wrote:

My email quit unexpectedly yesterday and I lost most of my emails on all accounts both on my MacBook and iPhone. Can I retrieve them?

quit mail;

try rebooting you mac

relaunch mail.app holding the shift key for a bit of a safe launch...compare your results

who provides your email? sounds like a server issue.

For problem accounts the go to way to sort things out is to delete the account, then add it back.

Remove email accounts in Mail on Mac

Remove email accounts in Mail on Mac - Apple Support

Add email accounts in Mail on Mac - Apple Support

Add email accounts in Mail on Mac - Apple Support

Note—

• IMAP accounts stay on the server, so no local loss, when you re-sync

• POP accounts download and remove from the server—therefor save your inbox/sent box if you want them

• "On My Mac" is just that, local folders you created and moved mail into. So no loss