[abdullahkhalids]

What exactly do you want synced? Shouldn't the two mail clients just sync with your mail server individually? If you send an email from desktop, it will land in the sent folder, which the mobile client will then sync and show.

[jcranmer]

Account settings, mail filters are two things routinely not stored on mail servers.

(Well, okay, there's sieve, but server support for sieve is kind of spotty, and most clients don't try to map their filters to sieve filters.)

[qiine]

settings, calendar, tasks, contacts, I have multiple mail accounts and a lot of info that reside only on my main PC currently, I estimated that redoing everything would take hours to me.

[abdullahkhalids]

Fair enough. I think the correct way to do it would be to integrate Firefox sync into Thunderbird.

[ies7]

Except settings, I use caldav+carddav (sogo) to sync those.

[hiepph]

If only they had configuration files...