On a shared, group or aliased mailbox every reply, reply-all and forward
went out as `identities[0]` - the account owner - whichever mailbox was
open. `autoSelectReplyIdentity` fused two behaviours: matching one of the
user's OWN identities, which never rewrites `From:`, and the domain
catch-all, which puts an address they have not configured into `From:`.
Only the first is safe for everyone, so it is now unconditional; the
rewrite stays behind the setting, which is what its description promises.
`findReplyIdentityId` already implemented that match and was referenced
only from tests.
`forward` is admitted to the match - it was excluded, so a forward from a
shared mailbox went out as the owner - but never takes the rewrite: a reply
continues a thread whose participants know the addressing, while a forward
introduces a rewritten From to a recipient the user just typed. Quick reply
matches own identities only, having no From row to show or correct a
rewrite, and now falls back to the primary's signature as the composer
does, so a shared-mailbox quick reply is still signed.
`findReplyIdentityId` now scans recipients in To, Cc, Bcc order rather than
scanning identities, and prefers an untagged identity over a differently
tagged sibling. Scanning identities let their order decide, and
`sortIdentities` puts the login's own address first - so `To: team@,
Cc: you@` replied as you, the case this is meant to fix.
Automatic selection is restricted to the active account: `composerClient`
follows the chosen identity, and a reply or forward still carries blobIds
only its own account's server can resolve. The dropdown still offers every
account's identities to pick by hand.
New messages are deliberately left gated: `composeFromAccountEmail` falls
back to `AccountEntry.email`, written once at first login, so resolving it
unconditionally would override a user-chosen default sender identity (#507).
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Patrick RotterandClaude Opus 5
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