Duplicate header 'MIME-Version' when using Mime Mail module with Answers module

First, thanks you very much for this module :)

I am using the Mime mail module in my project because it allows me to use HTML tags in D7.

I added some HTML tags to the email notification template and the mail server rejected the email because it has a duplicate 'MIME-Version' declaration (for information, i am using amazon SES for sending emails).

I noticed that in answers.notify.inc, there is the Mime version.

Anyway, I found a quick workaround:

In answers.notify.inc at line 115, replace

$message['headers']['Mime-Version'] = '1.0';

by

if (!module_exists('mimemail')){
		$message['headers']['Mime-Version'] = '1.0';
	}

It surely not the cleanest way, but for me it works. Maybe there is a better way to avoid duplication MIME Version.