Can I share an Account with another user?

Question

I am a current Thunderbird user, as are my coworkers. One of my coworkers is getting bogged down with emails he shouldn't waste time on.
What I need is a way for me to access his email and filter out junk mail and emails he shouldn't be concerned with. So he would need to see any emails I have flagged or starred indicating they need his attention when he opens his email.
In addition to this, my coworker will also need to be able to access and read emails offline. Ideally he would be able to access his email while on a plane and see the flagged emails here as well. Then once he is able to access the internet again, it would be best if he and I would be able to see the updates that he made while offline.
Ultimately, I need to know if I can continue to use Thunderbird and tag team an email account(s) with another user.

Answer 1

There's nothing to stop you both setting up the same account, though there's a risk the server won't let you both use it concurrently.
You'll both need to use IMAP if your colleague is to be able to see the results of your activities.
An alternative is for you to assume total ownership of the colleague's account, do your triage and then send on approved messages to a new account set up for your colleague purely for this arrangement. Mail Redirect would allow you to pass messages to your colleague which would appear to have come directly from the original sender, whereas regular email forwarding loses the provenance.