[mixmastamyk]

I've heard folks complain it gets slow with very large or old mailboxes. One reason that happens is that they need to be compacted, another is that the sqlites need to be vacuumed.

So, twice a year I compact my mailboxes, and I put a sqlite command loop to vacuum in my main cleanup script. Which I run maybe once a month.

Yes, strictly speaking I shouldn't need to do this, but my tbird install has been running happily for decades now.

[shakna]

I just switched from mbox to maildir instead. More storage used, faster client. Single change in settings.

[mmooss]

Does Thunderbird convert each folder automatically? Reliably?

[shakna]

Yes. At least in my experience.