app-specific passwords for dovecot

[mj]

Hi all,

I have read these documents on the subject of app-specific passwords:
> https://www.dgsiegel.net/news/2013_05_21-application_specific_passwords_for_dovecotand
> https://www.happyassassin.net/posts/2014/08/26/adding-application-specific-passwords-to-dovecot-when-using-system-user-accounts/

But since both articles are rather old, I'd like to ask if there are 
other/new ways of implementing app-specific passwords for dovecot/imap 
and postfix/smtp.

Also perhaps (web?) GUI's exist, to make it possible for the users 
themselves to generate/edit those passwords..?

Thanks for your suggestions!

MJ