By profession
When the mail is not yours to share.
Some inboxes carry other people's secrets. If yours does, a spam filter that uploads your mail to a vendor is a decision you have to justify, not a default you can accept.
- Lawyers
- Client correspondence filtered on your own machine, with no provider to select, bind or assess.
- Banks and finance
- A Postfix milter in your own SMTP path, so no ICT third party processes customer mail.
- Doctors and clinics
- Patient correspondence filtered on your own Mac, with no provider to bind to secrecy.
- Accountants
- Statements, valuations and client plans, filtered on your Mac with nothing sent to a server.
- Journalists
- A source's message filtered on your own machine, with no vendor holding the copy that names them.
The common argument
Every filter reads your mail. Only the location differs.
A filter cannot judge a message it has not read. That is true of every product in the category, ours included. So the question is never whether your mail gets read. It is where, and by whom, and what they keep.
Most filters answer: on our servers. For a professional under a duty of confidentiality, that answer is the whole problem, because it means a second company holds the correspondence you were trusted with. Klar answers: on your Mac. The part of the app that reads your inbox has no network access, so there is no copy, no vendor, and no retention policy to read.
How local-first worksThe on-device option
Free, private, in Apple Mail.
