New comment by Anachron on mblaze repository

https://github.com/leahneukirchen/mblaze/issues/205#issuecomment-820712908

Comment:
That's what I use but `msmtp` chooses the wrong account in this case:

```
msmtp: envelope from address example1@mail.domain not accepted by the server
msmtp: server message: 550-Requested action not taken: mailbox unavailable
msmtp: server message: 550 Sender address is not allowed.
msmtp: could not send mail (account default from /home/USER/.msmtprc)
```

How does `msmtp` figure out which account to use for my changed from-address? 

Edit:
I guess iI have to either edit the default account before sending or provide a mapping to an account for each mail-address like so:

```
# A second mail address at Runbox # The colon tells it to inherit the settings from the previous account 
account runbox2: runbox
from different-email@mydomain.com
```