Rated 5 out of 5 stars

Previous version worked fine, this one makes the Redirect button in the Mail Redirect window greyed out and unavailable when I begin to type whatever in the Resend-To field.

New version 0.9.6a1 is working now as fine as previously! Thanks a lot Onno!

BTW, is it possible to fill Resend-From field with the message's Delivered-To account by default, not the first account from Thunderbird's list?

This review is for a previous version of the add-on (0.9.5). 

This was caused by a function that got removed in Thunderbird 57.0a1 and was replaced by another function in Thunderbird 59.0a1.

nsIScriptableDateFormat was removed and first replaced with Intl.createDateTimeFormat and later with Intl.DateTimeFormat.

I've uploaded a new version to the development channel of AMO that solves this problem for beta users. Please go to AMO, scroll all the way to the bottom and click View classic desktop site, switch to Other Applications > Thunderbird on the top right, select/search Mail Redirect and scroll down again to open the Development Channel section and download version 0.9.6a1 and install it to your Thunderbird 57.0b* or 58.0b*.

P.S. I try to determine to which account the original messages was sent and use that account as the default from address. If that doesn't work, please file a ticket at https://sourceforge.net/p/mailredirect/tickets/