Rated 5 out of 5 stars

Από τον/την Ferryman στις Ιαν. 30, 2015 · μόνιμος σύνδεσμος

This add-on is a must for me, absolutely fantastic, it helps to keep my mails organized.

Unfortunately, "Change header details" option does not work anymore in TB v31.4. "Edit full source" does, but it's a bit more dangerous if you only want to change mail subject.