I have two accounts set up in ThunderBird, say acc1@example.com and acc2@test.org
I created a filter to forward all incoming messages to acc2@test.org to a couple addresses. Thunderbird attempts to send them from acc2@test.org (and fails because of email forwarding policies at that server). Therefore, I would like those messages to be sent from acc1@example.com.
I haven't found a way to achieve this, if at all possible. I'd appreciate any hint on how to do it.
Thunderbird 38.5.1 running under windows 8.1