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Augustin Marcin
b0640c9ecc
Adds an Override toggle in the composer's From row. When enabled, name and address become free-text inputs. Mail is still submitted through the selected identity, but the outgoing message's From: header — and the SMTP envelope MAIL FROM when different — is set from the override. The existing "Auto-select Reply Address" setting is extended: if the incoming message was addressed to an alias on a domain that matches one of your identities but isn't itself an identity (classic domain catch- all), it now auto-enables Override and pre-fills the alias. Quick reply honors the same resolution. The setting is relabeled to reflect the broader behavior. JMAP: client.sendEmail gains an optional envelopeMailFrom; when set, the EmailSubmission includes an explicit envelope with that mailFrom and the to/cc/bcc as rcptTo so header-From and envelope can diverge (JMAP §7.3). S/MIME: override is incompatible with sign/encrypt and is refused with a clear error — signing a different visible From from the identity's certificate Subject would produce messages clients reject. Tests: resolveReplyFrom covers exact match, sub-address stripping, catch-all detection, identity preference, and foreign-domain null.