Rated 4 out of 5 stars

You may use previous message information when creating a reply mail settings.
In a format similar to the following Datula previously used and the settings are allowed.
Dear %From%,
"%Subject%"
%Message-Id%
In wrote.

According to the help you can use,
%Subject% Subject
%From% sender's name
%LongFrom% email address that contains the name of the sender
%To% recipient
%Date% sent
%Message-Id% message ID
%Newsgroups% newsgroup name

This review is for a previous version of the add-on (0.2.0). 

I had the same idea with you too, and supported its function with version 0.3.0.
By the way, would you like to use Message-Id?
I don't think it necessary, but it would be supported if someone needs that.