> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ruber.me/llms.txt
> Use this file to discover all available pages before exploring further.

# Documentation

> How to use Ruber: mail, calendar, tasks and contacts. Written for people using the product, not evaluating it.

These pages are for using Ruber, not for deciding whether to. If you are still
choosing, the [product pages](/features) argue the case and name the limits;
this is the manual.

## What is here

**[Mail](/docs/mail)** — sending and receiving, folders and labels, filters and
forwarding, and the settings for connecting Apple Mail, Outlook or Thunderbird.

**[Calendar](/docs/calendar)** — events, repeating rules that survive a
daylight-saving change, a second time zone, and booking links.

**[Tasks](/docs/tasks)** — the board and its seven states, due dates you type in
words, and turning a thread into a task.

**[Contacts](/docs/contacts)** — the record, groups, custom fields, and the
history Ruber computes from your own mail.

## Two things worth knowing first

**Every mailbox has a mode, and it is set per mailbox.** Smart is
standards-first: IMAP, SMTP, server-side search and filters all work because the
mail plane can read the message. Private encrypts to a key only you hold, which
costs the features that need a server to look. Neither is the upgrade;
[mailbox modes](/mailbox-modes) is the full trade-off.

**These docs describe what is built.** Where something is not, the page says so
rather than leaving you to discover it — the same rule the rest of the site
follows. If a page here promises something and the product does not do it, that
is a bug in the page and [we want to hear about it](/contact).

## Developers

The API reference, webhooks and SDKs live under
[Developers](/developers/api). Worth setting expectations: most of that surface
is a documented contract rather than a running service, and each page says which
it is.