+imap.preformattedHTML::
+ A boolean to enable/disable the use of html encoding when sending
+ a patch. An html encoded patch will be bracketed with <pre>
+ and have a content type of text/html. Ironically, enabling this
+ option causes Thunderbird to send the patch as a plain/text,
+ format=fixed email. Default is `false`.
+
+imap.authMethod::
+ Specify authenticate method for authentication with IMAP server.
+ Current supported method is 'CRAM-MD5' only.
+