Posteo

What Is Posteo?

The conventional wisdom in email is that free is the floor. Gmail is free. Outlook is free. Yahoo Mail is free. The unspoken exchange — your inbox in return for your data, your attention, your advertising profile — has been normalised to the point where paying for email feels eccentric.

Posteo is the counterargument. Founded in 2009 in Berlin, Germany, Posteo charges EUR 1 per month for an email account that includes calendar, contacts, and notes. There are no ads. There is no data mining. There is no tracking. The entire infrastructure runs on renewable energy from Greenpeace Energy. And you can sign up and pay anonymously — Posteo accepts cash sent by post, requiring no name, no address, and no payment details linked to your identity.

For EUR 1 per month, Posteo provides what Gmail provides for free, minus the surveillance, and adds what Gmail cannot offer: genuine privacy, server-side encryption of all stored data, and the assurance that your email provider has no business interest in reading your messages.

Posteo is not trying to compete with Google on features. The storage is modest (2GB by default), there is no custom domain support, and the web interface is functional rather than sleek. But Posteo has been operating profitably for over 15 years on a business model that proves email does not need to be subsidised by advertising. It is not a startup chasing growth; it is a sustainable business that has found its audience and serves them well.

Key Features

Email with Full Protocol Support

Posteo provides standard email with full IMAP, POP3, and SMTP support. This means you can use Posteo with any email client — Thunderbird, Apple Mail, Outlook, K-9 Mail, FairEmail, or any other client that supports standard protocols. You are not locked into a proprietary ecosystem or a web interface.

The web interface (Posteo Webmail) is based on Roundcube and is functional, reliable, and fast. It does not have the visual polish of Gmail or Hey, but it handles email competently. Mobile access works through standard IMAP configuration on iOS and Android, or through the web interface.

Server-Side Encryption

Posteo encrypts all stored data at rest on its servers — emails, contacts, calendar entries, and notes. This is distinct from transport encryption (TLS, which Posteo also enforces) and end-to-end encryption. Server-side encryption protects your data if the physical servers are compromised or seized.

Posteo also supports S/MIME and PGP for end-to-end encryption, allowing you to exchange encrypted emails with anyone else using these standards. The setup requires manual key configuration, but for users who need end-to-end encryption, the capability is there.

Anonymous Signup and Payment

This is Posteo's most distinctive feature. You can create an account without providing your real name, and you can pay by sending cash in an envelope to Posteo's Berlin office. The payment is credited to a numeric account code — no link between your payment and your identity exists. Bank transfer is also available but is obviously less anonymous.

For journalists protecting sources, activists in sensitive environments, or anyone who believes that an email provider should not know who you are, this is a rare and valuable capability. Most competitors, including ProtonMail, require an email address or phone number for signup verification.

Calendar, Contacts, and Notes

Posteo includes calendar (CalDAV), contacts (CardDAV), and notes — all encrypted at rest and synchronised across devices using standard protocols. You can use any CalDAV/CardDAV-compatible app (Apple Calendar, Thunderbird, DAVx5 on Android) to sync your calendar and contacts. This replaces the need for Google Calendar and Google Contacts for users leaving the Google ecosystem.

Green Energy

Posteo runs its entire infrastructure on renewable energy certified by Greenpeace Energy (now Green Planet Energy). The company has published detailed sustainability reports documenting its energy sourcing, and it offsets remaining emissions. For environmentally conscious users, this is a meaningful differentiator — email infrastructure consumes substantial energy, and most providers do not disclose their energy sources.

TLS-Enforced Sending

Posteo offers an option to enforce TLS encryption for all outgoing emails. If the recipient's email server does not support TLS, the email is not sent, and you are notified. This prevents emails from being transmitted in plaintext across the internet. It is a strict setting that may occasionally prevent delivery to poorly configured servers, but for users who prioritise security, it provides a guarantee that their messages are encrypted in transit.

Pricing

Posteo's pricing is radical in its simplicity. There is one plan: EUR 1/month.

That includes email with IMAP/POP3/SMTP, calendar (CalDAV), contacts (CardDAV), notes, webmail, spam filtering, virus scanning, two-factor authentication, server-side encryption, and up to three email aliases.

Default storage is 2GB. Additional storage costs EUR 0.25/GB/month, up to a maximum of 20GB. For users who need more storage, 10GB would cost EUR 3.50/month total — still dramatically cheaper than most alternatives.

There is no free tier. Posteo's position is clear: free email is subsidised by your data; Posteo is subsidised by your EUR 1/month. This is the most affordable paid email service of any note, and the value per euro is extraordinary.

EU Compliance & Privacy

Posteo is headquartered in Berlin, Germany, and stores all data on servers in Germany. The company operates under German data protection law, which is among the most stringent in the EU.

Posteo's data collection is minimal by design. The company does not store IP addresses in email headers or server logs (they are stripped). It does not require real names for account creation. It supports anonymous payment. Server-side encryption protects stored data. The company publishes an annual transparency report detailing any law enforcement requests received.

For users and organisations subject to GDPR, Posteo's minimal data collection, German jurisdiction, and encryption practices provide a strong privacy foundation. There is no US parent company, no CLOUD Act exposure, and no third-party data sharing.

Who It's Best For

Privacy-conscious individuals who want to leave Gmail and Google's data collection behind without spending a fortune.

Journalists and activists who need anonymous email that cannot be traced back to their identity through payment records or signup data.

Environmentally conscious users who want their email infrastructure to run on certified renewable energy.

Users leaving the Google ecosystem who need email, calendar, and contacts from a single provider using open standards (IMAP, CalDAV, CardDAV).

The Verdict

Posteo is not flashy. The web interface looks like it was designed by engineers who care more about function than fashion. Storage is modest. There is no custom domain support. The mobile experience depends entirely on which email client you choose. But Posteo delivers something that Gmail, with all its features, cannot: email that is genuinely private, sustainably powered, and completely independent of the advertising industry. At EUR 1/month, it is not a sacrifice; it is a statement. Fifteen years of profitable operation prove the model works. If you have ever thought about what email would look like if it were designed for the user rather than the advertiser, Posteo already built it.

Frequently Asked Questions

Is Posteo as secure as ProtonMail?

They serve different security models. ProtonMail provides end-to-end encryption by default for ProtonMail-to-ProtonMail emails and stores data in Swiss jurisdiction. Posteo provides server-side encryption of all data, supports S/MIME and PGP (but does not enforce E2E by default), and allows anonymous payment — which ProtonMail's free tier does not. ProtonMail is better for users who need guaranteed end-to-end encryption. Posteo is better for users who value anonymity and affordability alongside strong server-side security.

Can I use Posteo with my own domain?

No. Posteo does not support custom domains. All accounts use Posteo addresses (@posteo.de, @posteo.net, @posteo.eu, and others). This is a deliberate choice to keep the service simple and affordable. If you need custom domain email with similar privacy values, consider Mailbox.org or ProtonMail's paid plans.

How does Posteo compare to Mailbox.org?

Both are German, privacy-focused, and affordable. Mailbox.org supports custom domains (from EUR 3/month) and offers more storage, while Posteo is cheaper, supports anonymous payment, and runs on certified green energy. Posteo is better for personal email with maximum privacy. Mailbox.org is better if you need a custom domain for professional use.

Is 2GB of storage enough for email?

For text-based email, 2GB is substantial — it can hold tens of thousands of messages. If you receive many large attachments, you may need to purchase additional storage or manage your inbox actively. Posteo offers additional storage at EUR 0.25/GB/month up to 20GB. Users accustomed to Gmail's 15GB may find the default limiting.

Does Posteo strip metadata from emails?

Posteo strips your IP address from outgoing email headers, preventing recipients from identifying your location or internet provider. This is an important privacy feature that most email providers, including Gmail, do not offer. ProtonMail also strips IP headers; most other providers do not.