Problems with my mail on Mac High Sierra 10.13.6 (MacBook Pro mid 2012)

Hello everybody,

Since I updated (security improvements, 3rd of January, 2020) my OS I've noticed some of my accounts set in mail (3 out of 4) showing an exclamation mark, Has anybody had this issue? Do I need to delete my accounts and create them again so that they can synchronise again?

P.D. : I've tried to synchronise by the option menu clicking on: "Mailbox" -> "Synchronise all accounts" with no success.

Any help is welcome.