About关于我们
A small mailbox on a cliff 悬崖上的一只小邮箱
One person, one serverless stack, and a stubborn belief that a mailbox should feel like a letter and not a feed. 一个人，一套 serverless 技术栈，和一个固执的念头：邮箱应该像一封信，而不是一条信息流。
Where the name comes from这个名字是怎么来的
The domain is di.fs.kg, and it is not random. 域名是 di.fs.kg，不是随手起的。
D.I.
Direct Interface
You deal with your mail directly. No advertising layer, no recommendation layer, nothing standing between you and the message someone took the trouble to write. 你直接和你的邮件打交道。没有广告层，没有推荐层，你和那封别人认真写下的信之间，什么都不隔。
F.S.
Fast Send
The path from writing to delivered is short, and it stays short. No queue of optimisations, no "processing", no progress bar that never finishes. 从写完到寄出，这条路很短，而且一直保持很短。没有层层优化排队，没有「处理中」，没有永远走不完的进度条。
There is a second reading we like just as much: Fast & Secure. Both are what this is trying to be. 我们同样喜欢另一种读法：Fast & Secure（极速与安全）。这两点都是它想做到的。
What is inside里面有什么
A mailbox, with the boring parts done properly. 一个邮箱，把无聊的部分认真做好。
Your own address属于你的地址
name@di.fs.kg — and, if you want a second face, aliases on ip.fs.kg or ok.fs.kg that land in the same inbox. name@di.fs.kg——想要第二张面孔的话，还可以在 ip.fs.kg 或 ok.fs.kg 上开别名，同样落进这一个收件箱。
A real inbox一个真正的收件箱
Folders, conversations threaded by Message-ID, search, stars, trash. Nothing clever, everything working. 文件夹、按 Message-ID 串联的会话、搜索、星标、回收站。不玩花样，但每样都能用。
Contacts联系人
Built up from your mail as you go, and editable when the guess is wrong. 随着收发信自动积累，猜错了随时能改。
Forwarding转发
A copy of every new message to another mailbox. The original stays where it is, and replies still reach the person who wrote to you. 每封新邮件都送一份副本到另一个邮箱。原件留在原地，对方回信仍然回到原作者那里。
Telegram pingsTelegram 通知
A short summary on your phone the moment mail lands. Off by default, one switch away. 邮件一到，手机上就收到一条简短摘要。默认关闭，一个开关的距离。
Invite only邀请制
No open signup. Codes come from the person who runs it, which is also why there is no spam problem. 不开放注册。邀请码由运营者发出——这也是这里没有垃圾邮件问题的原因。
What we believe我们相信什么
No ads. Ever.永远不做广告
A mailbox is not a place to sell you things. There is no ad slot here, and there is no plan to add one. 邮箱不是一个向你推销东西的地方。这里没有广告位，也没有加一个的计划。
No dark patterns不耍花招
No fake urgency, no pre-ticked boxes, no maze when you try to leave. The exit is a door, not a puzzle. 没有虚假的紧迫感，没有默认勾选，想走的时候不会撞迷宫。出口就是一扇门，不是一道题。
Your mail is yours邮件是你的
Export it, delete it, or walk away with it. A mailbox you cannot leave is not really yours. 可以导出，可以删除，可以带着走。一个走不掉的邮箱，其实不算你的。
Under the hood底下是什么
For the curious: the whole stack, without marketing words. 给好奇的人：整套技术栈，不加包装。
- Hosting托管
- Cloudflare Pages, with Pages Functions behind the API. No server to patch.Cloudflare Pages，API 由 Pages Functions 承担。没有服务器要打补丁。
- Database数据库
- Cloudflare D1 — SQLite. Your mail sits in ordinary tables you could dump yourself.Cloudflare D1，也就是 SQLite。你的邮件就在普通的数据表里，你自己也能导出来。
- Mail收发信
- Resend, in both directions: outbound sends, and inbound delivery over a signed webhook.Resend，收发都走它：发信走接口，收信走带签名的 webhook。
- Passwords密码
- PBKDF2-SHA256 with a per-user salt. There is no way to read a password back, including by us.PBKDF2-SHA256 加独立盐值。密码无法反读，包括我们自己也读不出来。
- Sessions会话
- One signed, HttpOnly cookie. No session table, so there is nothing central to leak.一个签名过的 HttpOnly cookie。没有会话表，也就没有一个集中的地方可供泄露。
- Front end前端
- Plain HTML, CSS, and JavaScript. No framework, no build step, no bundle to download.纯 HTML、CSS 和 JavaScript。没有框架，没有构建步骤，没有要下载的打包产物。
How to get in怎么进来
Registration is invite-only. If you know who runs this, ask them for a code. If you do not, this mailbox is probably not for you — and that is fine, there are excellent providers with more staff than this one has users. 注册需要邀请码。如果你认识运营者，找他要一个。如果不认识，这个邮箱大概不适合你——这没什么，市面上有的是比这里用户还多的优秀服务商。
Questions, or a code you would like: hi@di.fs.kg 有疑问，或者想要一个邀请码：hi@di.fs.kg