Posthaste
A modern, fast & powerful OSS email client with JMAP support
Your email, delivered at Posthaste.
Posthaste is an OSS modular email workstation. As a regular client, it is very fast, friendly and powerful, but it can also be deployed in various configurations, subscribed to as a daemon over documented API, and integrated with agents. I aim to make Posthaste the best email client in the world.
1. I am …
1.1. … a non-technical person …
1.1.1 … who doesn’t use email much
Posthaste is fast, pleasant, and nice to look at. You might not have a need for a better email client, but if you enjoy playing with a new app, give it a try. All your familiar workflows will be supported by Posthaste, and who knows — maybe I will have a feature to seduce you.
1.1.2 … who uses email a lot
You don’t need to be a hacker to enjoy Posthaste. Thanks to its technical prowess, Posthaste is very fast, and it is also fully keyboard and commands driven. Tag and forward, move to Archive, flag — all of this just with a few finger taps, no need to touch mouse.
You will find my smart mailboxes exciting — they support complex queries, including a fast full-text search, and can perform actions on members. Want to automatically forward invoices to management? No problem! Have a special directory for family-only? Easy!
1.2 … a technical person …
1.2.1 … who doesn’t use email much
Maybe I can turn email around for you? By launching Posthaste in a headless daemon mode on your remote VM you can issue commands to coding agents through emails. Important notifications can be automatically transmitted to your TV. Posthaste is fully scriptable and OSS, so you can even run Doom!
1.2.2 … who uses email a lot
If all previous sections didn’t sound convincing, know that Posthaste is created by email nerds for email nerds. Full, first-class JMAP support, offline optimistic writes, smart body & attachment pre-fetching with learnable online policy. Since Posthaste is split into modular components, you can write your own backend, runtime or client — make features you dream of come true, and let me handle the complex parts.