[HowTo] Replace courier with dovecot

[NoFutureKid]

I don't need help anymore... i helped myself

The Problem with the full qualified domainname is posted elsewhere in the forum (postfix related).

The other problem, with the authentication belongs to dovecot and give the the solution in my first post:

mechanisms = plain login digest-md5

because in your HowTo you write only:

mechanisms = plain <- that doesn't work for my Outlook clients (Thunderbird works fine)