Hosted mail
Hosted mail architecture
CrownvMail is Crownvo’s hosted business email layer. It is designed to feel like a focused Gmail or Zoho-style mailbox while remaining connected to Crownvo workspaces, conversations, identities, and domain administration.
1. Mail flow
- Outbound webmail uses authenticated SMTP submission through the MTA.
- Inbound SMTP is accepted by Postfix, filtered and signed, then delivered to the mailbox store and the inbound bridge.
- The bridge forwards RFC822 messages into Crownvo when a mailbox is linked to a workspace.
- Replies are correlated by message headers and normalized subjects so a conversation can stay together.
2. Custom domains
A customer connects a domain, publishes DNS records, verifies ownership, and then creates mailbox identities on that domain.
- MX points mail delivery at the CrownvMail MTA.
- SPF authorizes the sending infrastructure.
- DKIM uses a per-domain selector and public key.
- DMARC tells receiving providers how to handle unauthenticated messages.
- Cloudflare automation can create records when the customer grants access; otherwise the UI provides records for manual entry.
3. Mailbox controls
- Mailboxes can be send-and-receive or send-only for addresses such as noreply@.
- SMTP and IMAP credentials are separate from the Crownvo account session.
- The webmail UI provides inbox, sent, drafts, archive, spam, trash, compose, reply, forward, and thread actions.
- Mail authentication results and DKIM signing are observable through delivery diagnostics.
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