Hi,
Would it be possible to move our Thursday meeting to 10 am instead of 2 pm? Something came up in my afternoon.
And if you could send me the minutes from last time by Wednesday, that would be perfect.
Thanks!
Plume Mail
Mail client
Mail sorted for you. Never sent without your say-so.
Plume Mail brings your accounts into one window and helps you see clearly: categories, filters that run on your computer, summaries, reply drafts. Your mail stays kept there, readable even without a network. The assistant proposes, and nothing leaves without your say-so: automatic replies are off by default, and each one waits in an outbox where you can cancel it.
Your inboxes
Every account, one window.
All inboxes
Several accounts in the rail, “All inboxes” first, unread counts; folders, and Unread and Flagged views.
IMAP and SMTP
With an app password (iCloud, Gmail, Fastmail, Yahoo…), kept in the keychain; the servers are found from the address, whatever the domain.
Mail as it comes
New messages as soon as they arrive, the system’s notifications, the unread badge.
Offline too
Your mail is kept on your computer (on by default, account by account): lists, all inboxes, folders and kept messages can be read and searched without a network. Settings show the space used, and “Forget” gives it back.
Sorting
Every message in its place.
Categories
Personal, Notifications, Newsletters, Receipts, Promotions: guessed from the headers when it is clear, otherwise proposed by the assistant.
Filters on your computer
Rules on the sender, subject or text that file, mark or move incoming mail. None forwards your mail elsewhere.
Search
In a folder or across all inboxes, by sender, subject or text, or in plain words with the assistant. Without a network, in what is kept.
Read and write
From the keyboard, straight to the point.
Read safely
HTML cleaned and shown apart, with no scripts; remote images blocked until you allow them; a link’s real destination shown. Attachments never open by themselves, and a file that runs code asks before it is saved.
Write
Compose, reply, reply all, forward; drafts kept on the server; sending waits 5 seconds and can be taken back.
Quick work
Several messages at once, archive, move, Undo right after; ⌘K to go to a folder; Apple Mail’s shortcuts.
The assistant
An assistant that sorts, summarises and proposes.
It reads what you are looking at (a message, its thread, a folder) and proposes: a reply opened in the composer, categories, a filter, some tidying. It never moves or deletes anything by itself, and sends nothing without your say-so: a message is data, never an instruction. Each account chooses which models read its mail: none, your computer’s (by default), or a cloud model too.
Summarise
A long message or a thread, in a few lines.
Reply
Three short replies to pick from, or a drafted reply, opened in the composer: you are the one who sends.
Automatic replies, if you want them
Off by default, account by account: drafts only, or a reply (or an out-of-office message) that waits 10 minutes in an outbox where you can cancel or edit it. Your instructions say whom to answer and what to say; a mailing list, bulk mail or an automated message never gets one.
Dates, tasks, translation
What a message asks of you and by when; its translation.
Sort a folder
Categories for a whole folder proposed at once, approved with one click.
Search in plain words
“the plumber’s invoice in March”: the criteria it understood become chips you can remove.
Propose filters
A rule to file what keeps coming back, to read before you add it.
On the Mac, with Apple’s model
Summaries, sorting, the three short replies and a drafted reply: free, and nothing leaves the Mac (with Apple Intelligence).
What weighs asks twice
The trash, junk, a filter that moves mail: the proposal lists every message it targets, and asks again before it applies.
Models you can use
- Apple’s on-device model
- Ollama and LM Studio, on your computer
- Claude through Claude Code, with your Claude plan (no API key)
- Claude, with your API key
Not yet: Gmail without an app password and Outlook (OAuth), threads grouped in the list, HTML when writing.
Privacy
What it sends, and to whom
Everything that leaves the app, and nothing else.
- Your mail servers
- IMAP and SMTP, over TLS, certificates checked; your password stays in the keychain
- To fetch and send
- Your computer only
- The kept mail (one database per account, readable by you only), your categories and filters; Apple’s model, Ollama and LM Studio answer without anything leaving
- By default
- Anthropic (Claude API)
- Your request and the messages it concerns (an open message is cut at 8,000 characters)
- Only for an account that allows a cloud model, with Claude and your key
- Claude Code
- The claude installed on your machine, with its own sign-in and your Claude plan
- Only for an account that allows a cloud model, if you choose it
- Mozilla’s directory, the domain’s website and DNS
- Only the address’s domain, never the address: over HTTPS to autoconfig.thunderbird.net and the domain’s web servers, and as DNS queries, to find its servers
- When you add an account on a domain Plume does not know
- The account’s chosen model
- The start of each message that arrives while Plume is open and passes the rules without AI, with your instructions, to decide whether to reply
- Only with automatic replies turned on, and following the account’s AI access (your computer’s models, or a cloud model too)
- People who write to you
- An automatic reply in plain text, to the sender only, after its wait in the outbox
- Only if you turn automatic replies on for that account (off by default)
- Senders
- Loading remote images, which tells them the message was opened
- Only if you show them
- No one else
- No telemetry, no account, no background updates
- Never
Where it stands
First version
First version. Downloads will come with signed and notarized builds.
Systems
macOS · Windows · Linux
macOS first; Windows and Linux from the same code.
The family
