I'd like a mail server for jailbroken iPhones. I tried to install one from Cydia, but it was designed for Apple TV and sent my iPhone into a boot loop and I had to restore.
Having a local mail server would be useful for making local P2P WiFi links, and emailing photos/music/etc directly between phones without Internet access.
Perhaps using an email server that's written in a scripting language would work? For example, https://github.com/zedshaw/lamson is written in python. Perhaps you could get it running on your jailbroken device if you could get python and pip installed.
Having a local mail server would be useful for making local P2P WiFi links, and emailing photos/music/etc directly between phones without Internet access.