UwUMail Server 0.27.0

Fixed

• An alias added to an account later, by an admin or by the person themselves, now shows up as a
  sender identity right away. Until now only the addresses an account had when its identities
  were first read became identities. The server already let the account send as a later alias,
  but webmail and mail apps did not offer it as a sender. Removing an alias also removes its
  identity, unless the account may still send as it some other way (a send-as domain, a group or
  a shared mailbox). Aliases added before this release don't get an identity automatically: add
  it once in the identity settings, or remove the alias and add it again.

Added

• Admins can let a person send only within this server: a new switch "Only send within this
  server" on the person's page (off for everyone, logged in the audit log). Such an account can
  still write to every address on this server's domains, masked-only domains included. Recipients
  elsewhere are refused: in a mail app at the RCPT step with "550 5.7.1 This account may only
  send to addresses on this server", in the webmail and over JMAP they come back to the sender in
  a bounce while the people here still get the message. A message with nobody here at all is
  refused as a whole. Mail held back for later is checked again when it goes, and mail already in
  the outgoing queue bounces at its next attempt. Switched on for a shared mailbox, it also holds
  for its members when they send as it. Forwarding only goes to people on this server (existing
  targets elsewhere are skipped while the switch is on), forwarding addresses pass such mail on
  only to their targets here, away replies only answer senders on this server, and sending
  through a fetched mailbox's provider is switched off. Mail apps can see it in the JMAP session
  (uwuInternalOnly and uwuInternalDomains in the submission capability). See
  docs/jmap-sending.md.

Changed

• Webmail 0.25.0 (3695165): only sending within this server. For such an account the
  webmail says so under the sender, marks recipients elsewhere and won't send to them, and shows
  the server's refusal as such.