My company has a mail storage system (proprietary). It receives email
via lmtp and customers can get email from imap and pop3. This system
does not support imap subfolders. For particular reason we need to put a
imap proxy in front of this system and I choose nginx to do that. But
now we have a problem, our customers need to have subfolder features.
So I thought about a solution in imap proxy source code, intercept the
commands and get subfolder creation/access and change data. All imap
access (webmail/outlook) will use this proxy.
If one create a parent folder, let it do this, (ex. Sent)
If one request to create a sub-folder (Sent/2007) we change the request
and create _xxx_Sent_2007 (as parent folder), When client (through
proxy) will list or access the folder Sent, we intercept the request,
read the original folder name and change the response to subfolder
In other words, our sub-folder protocol would be
It’s a little bit comlex, but the big question is, what do you think
Do you know any solution that implement any variation of this idea?