Rated 4 out of 5 stars

Love it. I wish Thunderbird allowed built-in customisation of reply headers (or at least defaulted to inculde hte header the way Forward does). Now looking forward to find a plugin to customise Thunderbird reply-quoting (ie. turn off the vertical blue line on the LHS and RHS of the quoted original message). And the RE and FW or FWD tag in the Subject line stays there for me.

This review is for a previous version of the add-on (0.4.3).