Continuing this request from early ages
https://together.jolla.com/question/201359/email-app-how-to-sendreceive-emails-with-alias-address/?answer=201571#post-id-201571
It would be nice to have the possibility to register mail aliases within a mail account.
Reason: to be able to send a mail from a shared account with other mail address than the one this was registered.
There’s already a similar thread including the community discussion link 
- Opportunity to choose e-mail identity / alias as "From" when sending an email
Oh yes!
And I also “liked” it (more than a year ago). Seems like memory overflow… 
What we actually need is alpine. 
Bumping to make sure people find up-to-date information: this has been added in a recent software update, aliases can now be added from the account settings.
(some extra words here to bypass the spam filter)