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SuperMail docs

Export your data

You can export everything in your SuperMail workspace at any time. No lock-in.

Status

Mailbox export ships in v0.6.2 as an asynchronous, email-notified flow:

  • Format: .mbox (mboxrd variant), one file per workspace.
  • Trigger: Settings → Data → Export mailbox → Start export.
  • Delivery: when the export is ready, you get an email with a signed download link valid for 7 days.

Until v0.6.2 lands the in-app button is not yet wired up. If you need an export today, email [email protected] and we’ll generate one manually.

What’s included (post-v0.6.2)

  • All messages in all folders, including Spam and Trash, with their original MIME structure preserved.
  • Attachments inline in the mbox file (no separate download).
  • Read / unread state preserved as standard IMAP flags.

What’s not included

  • Drafts that haven’t been saved.
  • Account settings, contacts, tags, send profiles - those aren’t email and aren’t exported.
  • Billing history (see Settings → Billing → Invoices for PDF invoices).

Importing elsewhere

The exported .mbox file uses the mboxrd variant, which Thunderbird, Apple Mail (via Thunderbird re-export), mutt, getmail, offlineimap, and Python’s mailbox.mbox reader all understand.

Thunderbird: use the ImportExportTools NG add-on → Import mbox file.

Apple Mail: File → Import Mailboxes → Files in mbox format.

Verifying your export (post-v0.6.2): if you want to sanity-check the file before relying on it, point Python’s standard mailbox module at it:

import mailbox
mb = mailbox.mbox('supermail-export.mbox')
print(f'{len(mb)} messages')

If that prints the count you expect, the file is well-formed and round-trips through every modern mail client.

Export on cancel

After cancellation, exports remain available for the full 30-day read-only window. Once your account is fully closed, exports are no longer possible.