Here's a nice article about how to access a ProtonMail account from mutt. I would imagine it could be applied to TutaMail as well.
https://kaythomas.dev/posts/mutt-protonmail-bridge.html
My questio...
@nprofile1q... : No, TutaMail doesn’t offer IMAP access. It would not work.
For mutt, you can have two muttrc and switch from one to another with a shortcut (here 1 and 2):
<code>
macro index,pager 1 '<sync-mailbox><refresh><enter-command>source ~/.config/mutt/protonmutt.rc<enter><change-folder>!<enter>'
macro index,pager 2 '<sync-mailbox><refresh><enter-command>source ~/.config/mutt/othermutt.rc<enter><change-folder>!<enter>'
</code>
For mutt, you can have two muttrc and switch from one to another with a shortcut (here 1 and 2):
<code>
macro index,pager 1 '<sync-mailbox><refresh><enter-command>source ~/.config/mutt/protonmutt.rc<enter><change-folder>!<enter>'
macro index,pager 2 '<sync-mailbox><refresh><enter-command>source ~/.config/mutt/othermutt.rc<enter><change-folder>!<enter>'
</code>