Aionda Mail offers email, calendar, and contacts with end-to-end encryption using post-quantum cryptography, including ML-KEM-1024.
Posteo
Posteo provides ad-free email, calendars, and address books with synchronization, encryption, and paid accounts starting at one euro per month.
About Posteo
Posteo provides email accounts with calendar, address book and notes. The service is described as ad-free with no tracking or user profiling, and includes spam and virus protection, a migration service for existing mailboxes, and encryption options for transport and stored data.
Key features
- 4 GB email storage with upgrade option
- Webmail and web app access
- IMAP and POP3 support for external apps
- Calendar sync via CalDAV with ICS sharing
- Contacts sync via CardDAV with VCF import and export
- Two-factor authentication via TOTP
Posteo at a glance
- Website
- posteo.de/en
- Category
- Privacy & Security › Private Email
- Type
- Online tool
- Pricing
- Paid
- Platforms
- Web
- Details verified
- Oct 22, 2026 · Official source
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Posteo alternatives
Tools and sites you could use instead, ranked by how closely they match.
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Set a temporary inbox duration from ten minutes to one month with MinuteInbox.
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Free
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