I am experiencing the same problem.
I upgraded from 16.04 LTS. I have other add-ons than Enigmail (and maybe some default add-on that Ubuntu delivers).
I only have IMAP of two GMail accounts.
I am experiencing the same problem.
I upgraded from 16.04 LTS. I have other add-ons than Enigmail (and maybe some default add-on that Ubuntu delivers).
I only have IMAP of two GMail accounts.