[Dovecot] tags disappear in Thunderbird (OT: Maildir preference)

[Jakob Curdes]

>> b) file is corrupt (altered by two processes, bad sector, filesystem
>> corruption on file level) - the mbox file can be repaired easily, if you
>> want, by hand.
>>      
> With mbox data is moved in-place within the file while doing expunge. A
> crash in the middle of expunge corrupts the mbox file, although no data
> will actually be lost with the way Dovecot does it (but you may have
> duplicate mails and one of the mails could be split into two parts
> inside the file). A power loss during expunge could be worse and maybe
> lose data, depending on OS/filesystem.
>
> With maildir a crash will never lose or corrupt anything. A power loss
> also won't corrupt anything, only (maybe) lose some changes. With
> filesystem corruption anything can happen of course..
>    
Since years I am impressed with the stability of our dovecot 
installations even under high load situations etc.
So we should probably put it that way:

a) corruption is unlikely with both formats b) if you have (filesystem) 
corruption, you need a good backup ...

JC