Can't download new email

Hello,

Today I've been completely unable to get new email on my Apple Mail.app.

All the email arrives at my iPhone and iPad as usual, but Mail.app running on my MacBook pro receives nothing.

I tried various solutions, I've even deleted my accounts from Mail.app and re-added them, to no avail.

Indeed, after deleting and re-adding the accounts, my mailboxes appear completely empty, zero emails in there.

My email accounts are Gmail and iCloud, and are connected through IMAP, therefore there should be no problem from that part.

Any ideas/solutions would be appreciated...