Nicolas Sebrecht

> Should we add a simple function to detect the name of the `IMAP` mail server software, as displayed in the `IMAP` banner string, after the capability? That's possible. The...

The last error is not the same. Something else is going on. It's hard to guess what's going on, though. Do you have access to the server logs?

Could you provide the logs of the failure with the fixed version (from the 'next' branch)?

That's yet another error message. This explains the error. > We should probably detect both "`cannot`" and "`create`", and "`already`" and "`exists`", and "`NO`" At this point, I'm in favour...

The other way might be to try the still experimental [utf8foldernames](https://github.com/OfflineIMAP/offlineimap/blob/master/offlineimap.conf#L442) configuration option.

Did you configure the sep character on either repository section? This might help.

I fully agree with you. The MD5 migration option was introduced by @iliastsi because the FMD5 was unexpectedly changed by introducing another feature. I bet this MD5 will hurt again...

> The uidvalidity, uid pair is guaranteed to be unique forever in a given folder. It says nothing about other folders in that server. Right.

If we change the FMD5 meaning (which would make sense), I think we should start versioning the filename.

> What do you mean by versioning? Add a version number for the "filename format"? If we end up changing the filename format again, maybe we should do that, yes......