S/MIME
by Linus Rath
End-to-end S/MIME for webmail: sign and encrypt outgoing messages, and automatically verify signatures and decrypt incoming CMS (PKCS#7) mail. Private keys are imported from a PKCS#12 (.p12/.pfx) file, encrypted at rest with a passphrase, and unlocked into non-extractable WebCrypto keys that never leave your browser. Runs in the privileged (same-origin) plugin tier so all cryptography happens locally with bundled pkijs/asn1js.
Spam Score
by Linus Rath
Adds a Spam Analysis section to a message's "More details" panel. Reads the raw spam-filter headers (SpamAssassin / Rspamd score, threshold and level, plus any AI verdict) directly off the message and shows a colour-coded breakdown.
Calendar Agenda
by Linus Rath
Shows an agenda of your upcoming calendar events in the sidebar.
External Mail Warning
by Linus Rath
Warns before sending email to recipients outside your safe-domain list, and flags incoming messages from external senders with a banner. Admins can pre-populate organisation-wide safe domains.
Impersonation Notice
by Linus Rath
Shows a persistent top-of-app banner when the active session is a Stalwart master-user impersonation (username contains '%'), with a configurable 'Return to platform' button. Detection is automatic; admins configure the platform return URL and banner styling.
Jitsi Meet
by Linus Rath
Adds a 'Add Jitsi Meeting' button to calendar events. Meeting URLs are generated server-side via the /api/jitsi sidecar.
Gravatar Avatars
by Linus Rath
Resolves Gravatar profile pictures for email contacts via the avatar transform hook
External Link Warning
by Linus Rath
Warns before opening external links to unknown domains. Admins can pre-populate a trusted domain list.
External Recipient Warning
by Linus Rath
Warns before sending email to recipients outside your safe-domain list, and flags incoming messages from external senders with a banner. Admins can pre-populate organisation-wide safe domains.
Subway Surfers
by Linus Rath
Writing emails is boring - it doesn't have to be. Adds a Subway Surfers sidebar to the New Message dialog, picking a random 6-minute jump-in point from a one-hour gameplay video.
Quick Notes
by Linus Rath
Per-email sticky notes in the sidebar — jot notes while reading emails