>>bm3+89
Perhaps not much, but last year I was looking at using IMAP as an export/import path for a relative's old Eudora mails to some much-more-recent client. I insisted on it, after I found out it could no longer make a secure connection to their e-mail server.

That said, I was saved/pleased by Eudora2Unix [0], one of those projects that represents a very long slow burn of successive people with a similar niche struggle. You might think Thunderbird would have an import tool for that, but it's been so many years it didn't survive...

[0] https://github.com/jonabbey/eudora2unix

>>techst+(OP)
I love imapsync:

https://imapsync.lamiral.info

This is the way projects used to be, and surprisingly excellent ones still are.

The amount of knowledge built into this is incredible:

https://imapsync.lamiral.info/S/news.shtml

// imapsync did 14M to 21M mailboxes transfers per month in 2024, or 0.22% of ALL email traffic

>>Terret+sp
I haven't had excuse to use imapsync for awhile. I remember using it fondly in the past. I definitely hadn't looked at the site in years.

I see that there's a free (for up to 3GB, pay for more) migration service offered there now, too: https://imapsync.lamiral.info/X/

That's a pretty cool way to support the project.

>>Terret+sp
imapsync is slower than mbsync[1] (both in startup and per message) and doesn't support bidirectional sync[2]. It however handles message identity better than mbsync and supports using different authorization and authentication. For administering our mailserver, I first used imapsync and then patched mbsync to support the Auth header. I still use imapsync to sync the flags afterwards. I think both have high-level race conditions, so maybe take the server offline during a sync.

    [1] https://isync.sourceforge.net/
    [2] https://imapsync.lamiral.info/FAQ.d/FAQ.Two_Ways_Sync.txt

>>bm3+89
I was an early employee at MigrationWiz (BitTitan), always cool to see recognition of the co in the wild.

Geeman, the founding CEO would have definitely sent a C&D immediately, but BitTitan was acquired by a PE firm and I don't find it hard to imagine nobody cares anymore. [0][1][2]

[0] https://www.reddit.com/r/msp/comments/1mnelca/migrationwiz_w...

[1] https://www.reddit.com/r/msp/comments/1qnwkwl/do_not_use_bit...

[2] https://www.reddit.com/r/sysadmin/comments/1qswdub/bittitan_...