install_update_dovecot.conf.sample: change 'auth_mechanisms' to 'PLAIN LOGIN'.

conf/install_update_dovecot.conf.sample

@@ -65,6 +65,13 @@ dbuser=postfix
 dbpassword=i""
 dbhost=/var/run/postgresql
 
+# - Password databases have a default password scheme.
+# -
+# - The password scheme can be overridden for each password by prefixing 
+# - it with {SCHEME}, for example: {SHA512-CRYPT}pass.
+# -
+# - See: https://wiki.dovecot.org/Authentication/PasswordSchemes
+# -
 default_pass_scheme=PLAIN
 
 
@@ -87,7 +94,7 @@ spam_folder=Spam
 
 max_userip_connections=24
 #auth_mechanisms="plain login digest-md5 cram-md5"
-auth_mechanisms="plain login cram-md5"
+auth_mechanisms="plain login"
 
 # - Settings for quota warning sript
 # -