Email archiving solution

Currently there is no lightweight, simple TKL appliance that I am aware of to fulfill your desire.

Thanks for the info, but it says "Email messages will appear in folders arranged by year and month". That's not what I need - I need to preserve the folder structure as it was in the accounts that I need to archive. Otherwise, all the context of the emails would be lost.  I find it strange that this is not a very common use case: for example, you have a project where a lot of "conversations" happen simultaneously, but they couldn't be grouped together by any other metatdata than the folder they're in. Year and month really doesn't help.

Hi Elizabeth, thanks for the suggestion. I had a look at Enkive, and it looks great as an enterprise archiving solution for searching a great number of emails. However, I would like to preserve the folder structure of my IMAP accounts. That's why I don't import them into gmail (gmail's support for folders is abysmal, tagging is just not the same as a structured folder system). What would be enough for me is a backend that supports IMAP directly. I guess a simple IMAP server would be sufficient, but ideally, I don't want to set one up myself, but rather use an appliance maintained by people who are more able than me in this regard. http://www.citadel.org is a great solution, but adds to much overhead that I don't need and that often gets in the way...

Christian

Thanks for your answers! To have an IMAP server coupled with the awesome TKLBAM systen would be marvelous for my purposes but also for others who simply want to set up an email server. I won't be able to contribute one, unfortunately, but maybe someone can produce such an appliance eventually. 

I came across Piler (http://www.mailpiler.org/en/index.html), maybe this could be worth a try.