About Purelymail Calendar
Purelymail Calendar is a free, unofficial web app that adds full calendar views, meeting invites, and RSVP tracking to any Purelymail mailbox.
Why this exists
Purelymail is a low-cost, no-nonsense email host with a great web UI. It supports CalDAV for calendar storage, but it doesn't ship an iMIP or iTIP scheduler — so sending a real meeting invitation that shows up correctly in Gmail, Apple Mail, and Outlook isn't possible out of the box. RSVPs from attendees don't flow back into the calendar either.
Purelymail Calendar fills that gap. Sign in with a one-time email link, connect your Purelymail mailbox once, and you get a clean calendar interface with proper iTIP scheduling.
What you can do
Send meeting invites
iTIP REQUEST emails from your Purelymail address. Rendered as real
calendar invites by Gmail, Apple Mail, and Outlook.
Track RSVPs
The IMAP poller pulls attendee replies, matches them to the event, and updates
each PARTSTAT on the underlying CalDAV record.
Month, week, day views
Drag to move, click to create, live "now" line. Built for keyboard-and-mouse speed.
Updates and cancellations
Bump SEQUENCE properly so attendees' calendars update in place.
Cancellation sends METHOD:CANCEL so the event is removed from their
calendars too.
How sign-in works
Authentication is passwordless. You enter your email and click a one-time link delivered to your inbox. After verification, you're asked once for your Purelymail mailbox password. That password is encrypted at rest with Fernet (AES-128-CBC + HMAC) using a server-side key, and only decrypted when the app needs to talk to Purelymail's CalDAV, SMTP, or IMAP servers on your behalf.
Where your data lives
Your events live on Purelymail's CalDAV servers, exactly where they already were. Purelymail Calendar is a thin interface layer on top — if you stop using the app, your calendar is unchanged. The only data the app stores about you is a user row (email, display name, timestamps), your encrypted mailbox credentials, and your active session cookie.
Frequently asked questions
Is this an official Purelymail product?
No. Purelymail Calendar is unofficial and is not affiliated with, endorsed by, or sponsored by Purelymail. It is an independent project.
Is it free?
Yes. You only pay for your existing Purelymail mailbox.
Does it work for custom domains hosted on Purelymail?
Yes. Any Purelymail mailbox works — your default @purelymail.com address
or any custom domain you have routed through Purelymail. The app auto-discovers your
Purelymail account ID via a PROPFIND on the WebDAV root.
Will my invites land in spam?
Invites are sent from your own Purelymail mailbox using your own SMTP, so deliverability is determined by your domain's SPF/DKIM/DMARC setup — the same as any regular email you send. The MIME structure is the same shape Apple Mail, Gmail, and Outlook use for their own invites.
Is the source available?
Yes. Source is on GitHub at github.com/bhartiyashesh/purelymailcalendar . Released under the MIT license.
Who built this?
Yashesh Bharti — yasheshbharti.com.