Thought I’d mention this here:
is a full-up mail server suite using dovecot, postfix, etc. There is a thread about it on lowendtalk.com where some people discuss using it.
I’m mentioning it because I know people here are interested in running mail servers on C1’s and it looks like it might be a good instantapp. It’s not exactly a “request” on my part since I don’t think I want to run a mail server myself. So I’m just sharing the info, at least for now.