I built MailCode because my mailbox outgrew my mail app. An Exchange quota that kept filling, a stack of PST exports nothing on my Mac would open, and the standard advice being "delete some mail." I wanted the opposite keep all of it, locally, and find any of it instantly. Three things it does differently: • Every message is archived on your own disk. There's no service of mine in the middle. When the server quota fills, you move mail to local or external storage — and it fetches the attachment bytes before anything is removed. • It opens PST, OST, .eml, .msg and maildir, folder tree intact, indexed on the way in. • Search is a query language: f: s: b: to: cc: in: df:/dt: label: flag:, with AND/OR. Plain questions work too, answered locally with no model involved. Tested against my own archive rather than a demo one: 280,901 messages, 31 GB, 1.2 million attachments — median search 5 ms. AI is there for compose, summarise and translate, but on your own API key. I built a hosted relay and then cut it: the whole pitch is that your mail doesn't route through my servers, and an AI relay would have broken that exactly where the content is most sensitive. Free 14-day trial, then a one-time purchase. No subscription. macOS 12+ on Apple silicon; Windows is built and waiting on installer code signing.

MailCode

Exchange, M365 and IMAP mail kept on your own disk

Exchange, M365 and IMAP mail kept on your own disk