skymail

skymail

skymail is the visor's mailbox. It takes SMTP on port 25 over dmsg and skynet for <anything>@<base32-pk>.skynet (or .dmsg) and keeps the mail in a Maildir. The transport authenticates every sender's PK, so it needs no domain, certificate, SPF or DKIM.

Every visor runs it unless the config's skymail section or skywire cli mail settings enable=false turns it off. The visor starts it in process with these arguments, taken from the config section:

skywire app skymail --dir <mail dir> [--max-message-size N] [--max-total-size N] [--max-age D]

To run it as a separate process, list it in the launcher config with "launcher_mode": "external" and give it --addr 127.0.0.1:<port>. The visor's mail API (skywire cli mail, the hypervisor Mail tab, the phone app) then reaches its control surface on that address, with the token the app writes to control-token beside the mail.

The visor keeps its secret key. The app asks it over the app RPC to seal and open envelopes, and to name the visors it manages and its hypervisors, which are the default helpers and relay-for lists. See docs/guides/skymail-bridge.md for using it.