[Dovecot] Unique message IDs?

[Timo Sirainen]

On Tue, 2011-11-22 at 00:47 +0300, Alexander Chekalin wrote:

> > With Maildir the message GUID is typically the same as the Maildir base filename (i.e. everything before ':' character).
> 
> But what if I one day decide to convert my maildir's to mbox'es?
> I really plan to do such conversion in a while (as soon as I finish the 
> indexing system).

mbox? or mdbox? With mbox there are no proper GUIDs, but Dovecot kind of
fakes it by returning MD5 of specific headers as GUIDs (so not 100%
reliable). With mdbox GUIDs work even better than with Maildir, the GUID
is always stored in the message's metadata.