---
title: Mailbox.org
kind: note
description: 'Link Resources Webmail Support User forum FAQ Servers IMAP: imap.mailbox.org : 993 (TLS) SMTP: smtp.mailbox.org : 465 (TLS) MTA-STS Mailbox.org has configured MTA-STS for its hosted domain. Their…'
words: 80
readingMinutes: 1
created: '2025-07-22T00:00:00.000Z'
updated: '2026-03-19T20:49:06+01:00'
website: https://www.mailbox.org/
---
## Link

<https://www.mailbox.org/>

# Resources
- [Webmail](https://app.mailbox.org/)
- [Support](https://support.mailbox.org/)
- [User forum](https://userforum-en.mailbox.org/)
# FAQ
## Servers
- **IMAP:** imap.mailbox.org : 993 (TLS)
- **SMTP:** smtp.mailbox.org : 465 (TLS)
## [MTA-STS](/notes/mta-sts)
- Mailbox.org has configured [MTA-STS](/notes/mta-sts) for its hosted domain.
	- [Their policy](https://mta-sts.mailbox.org/.well-known/mta-sts.txt)
- For custom domains:
	- [Example policy](https://mta-sts.danielfisher.com/.well-known/mta-sts.txt) by user danielfisher.com
		- [Related DNS record](https://mxtoolbox.com/SuperTool.aspx?action=mta-sts%3adanielfisher.com&run=toolpage)
	- [Related forum thread](https://userforum-en.mailbox.org/topic/1921-mta-sts)
## <span class="dead-link">CalDAV</span> credentials
- **Server**: https://dav.mailbox.org:443
- **Username**: Your primary mailbox address (e.g. `max.mustermann@mailbox.org`)
- **Password**: Your account password or, if <span class="dead-link">MFA</span> is used, an application password (Settings > Security > Application passwords; select "CalDAV/CardDAV" and add a new one)