For years I have the following problem that I'd like to solve finally.
I have my own server with an email account, e.g.
firstname.lastname@example.org. Then I have another identity (email address with another domain, but belonging to my server), let's say
The Mozilla wiki Multiple identities per e-mail account says:
When you reply to a message, Thunderbird uses the identity that matches the address the message was originally sent to, if it can find a match in the account you are working in.
Well, when I reply to an email that was sent to
email@example.com Thunderbird always uses
firstname.lastname@example.org as the sender. Always.
I tried a lot but could not find a solution until now, how frustrating!