Allow html in signatures

Is it possible to provide a brief explanation on how this works? I attempted to add some simple HTML to a signature and the HTML tags show up in the signature. The attached screenshot should illustrate.

This is my first day using MailMate so there is a good chance this is user error.

@Jason: First update to the latest beta in the Software Update preferences pane. The following is from the manual in that beta:

MailMate is a plain text email client and the only way to generate rich text emails is to use the Markdown. For some users this is a problem because they are required by company policy to include an HTML signature in every email sent. This special case is solved by MailMate by allowing a signature to be defined with an HTML variant. This is raw HTML code and when such a signature is used MailMate generates HTML for the email and inserts the HTML signature in the HTML part of the email. Note that this easily doubles the size of each email (disregarding the use of Markdown or any attachments) and therefore you shouldn't use it unless you really need to.

Note that defining signatures both with and without an HTML variant allows you to make the behavior depend on the recipient of the email.

HTML signatures work for both Markdown and plain text messages.

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