doveadm pw -s CRAM-MD5 -p blabla

mcedit /etc/dovecot/passwd

admin@domain.local:{CRAM-MD5}blablabla_coded_CRAM-MD5
admin2@domain.local:SuperSecretP@ssw0rd

mcedit /etc/dovecot/dovecot.conf

auth_mechanisms = plain login cram-md5
disable_plaintext_auth = no
first_valid_gid = 12
first_valid_uid = 8
last_valid_gid = 12
last_valid_uid = 8
listen = *
log_path = /var/log/dovecot/dovecot.log
login_greeting = POP3/IMAP

mail_gid = 12
mail_uid = 8

mail_home = /var/mail/%Ld/%Ln
mail_location = maildir:~/:UTF-8:INBOX=~/INBOX

protocols = imap pop3 lmtp

service lmtp {
    unix_listener lmtp {
      user=exim
      mode = 0660
   }
}

service auth {
  unix_listener auth-client {
    mode = 0660
    #group = mail
    user = exim
  }
}
service imap-login {
  inet_listener imap {
    port = 143
  }
  inet_listener imaps {
    port = 993
    ssl = yes
  }
}
service pop3-login {
  inet_listener pop3 {
    port = 110
  }
  inet_listener pop3s {
    port = 995
    ssl = yes
  }
}
ssl_cert = </etc/ssl/certs/mail.pem
ssl_key = </etc/ssl/certs/mail.pem

userdb {
  args = uid=mail gid=mail
  driver = static
}

passdb {
  driver = passwd-file
  args = scheme=plain username_format=%u /etc/dovecot/passwd
}

protocol pop3 {
  pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
  pop3_uidl_format = %08Xu%08Xv
}