The compose window opens in one of two ways: from the Write button in the left sidebar (a fresh letter), or from the Reply link at the foot of any letter (which pre-populates To, Subject, and the quoted body).
§ The header
- From
- Auto-selected from the received address. Override via the dropdown.
- To
- One or more addresses, comma-separated. Tab to leave the field.
- Cc / Bcc
- Hidden by default; click to reveal.
- Subject
- Plain text.
Re:is prepended automatically on replies.
Martin,
The kerning on the title is tight — can we give the subtitle a hair more room before…
§ Formatting
Select any text to summon a small bubble with bold, italic, and link. Or use the shortcuts ⌘B / ⌘I / ⌘K. The shape on disk is markdown — type **bold**, *italic*, [text](url), or start a line with > for a quote or - for a list, and your letter goes out as a properly-rendered HTML email with the plain markdown source as a text fallback. Paste a URL onto a selected word and it becomes a link in one move.
§ Attachments
Drag files onto the compose window, or use the paperclip in the footer. Each letter carries up to 7 MiB of attachments total, and no individual file can exceed 7 MiB — the mail service accepts a 10 MiB message once encoded, and attachments grow by about a third in encoding. Storage is included and not metered by plan today; we limit single-letter weight to keep delivery predictable.
Executables (.exe, .bat, .cmd) are rejected outright — most mail servers would bounce them anyway. Zip them if you must.
§ Signatures
Each identity can carry its own signature. They're set from /app/domains/<fqdn>, one per domain, and are appended automatically below your reply with an -- separator (mail convention; clients like Apple Mail and Gmail will render them correctly as signatures, not quoted body).
§ Sending
Hit Send and the letter is handed to SES, DKIM-signed in the domain's own key. A toast confirms delivery. If the address is malformed or the recipient's domain rejects the envelope, the toast turns the colour of a ledger entry in the red — and the letter drops into Drafts with the reason attached so you can fix it and try again.