Where do I set dovecot protocols
Solution 1:
In the middle of the /etc/dovecot/dovcot.conf there should be a section as follows:
# Enable installed protocols
!include_try /usr/share/dovecot/protocols.d/*.protocol
This builds up the protocols list object by having each file append the required protocol to the end of the list e.g. /usr/share/dovecot/protocols.d/imapd.protocol contains the following:
protocols = $protocols imap