Mailum review covering its zero-knowledge encryption, Poland servers, crypto payments, free and paid plans, and privacy trade-offs for Monero users seeking private email.
Mailum.com has maintained the same domain registration since October 22, 2012. The service previously operated under the Cyberfear name, with listings noting unproven allegations of honeypot activity that lack supporting evidence.
Its servers reside in Poland, placing them outside the 14-eyes alliance. The provider states that it maintains no IP logging policy except for a five-minute temporary record created during registration to deter abuse, after which the data is discarded.
Mailum positions its zero-knowledge end-to-end encryption as more comprehensive than body-only solutions. The encryption covers the message body, subject line, sender and recipient addresses, and timestamp metadata. This scope is presented as the primary differentiator from competing encrypted email services that leave headers and metadata exposed.
The service further emphasizes open-source code, Tor and .onion support, and anonymous cryptocurrency payments through processors such as CoinPayments, with no KYC or phone verification required for account creation.
Mailum applies zero-knowledge end-to-end encryption across the full email package: body, subject, sender address, recipient address, and timestamp metadata. This scope exceeds providers that encrypt only message content, reducing the metadata visible to the service itself.
The codebase is open source and the service includes PGP support for users who require interoperability with legacy systems. Access is available through a Tor .onion endpoint, which masks the client IP from the server during normal operation.
Servers sit in Poland, outside the 14-eyes alliance. The operator records no persistent IP logs, with the sole exception of a five-minute temporary record created only during registration to block flood attacks.
These protections carry explicit limits. Standard email routing still requires unencrypted headers for delivery, so the service cannot hide all transport metadata from network observers. Self-hosting is limited to the frontend via the “Local Code” option; the backend remains on Mailum infrastructure. Clearnet connections or use with third-party clients that do not enforce the same encryption settings can expose IP addresses and timing data. The privacy policy at mailum.com/privacy documents these boundaries and does not assert that users become untraceable or immune to legal compulsion at the server location.
The official pricing page lists only the free plan in detail. It provides 0.05 GB storage, one email address, zero custom domains, unlimited incoming messages, and a sending limit of two emails per hour.
Secondary figures appear in an April 2026 Make Tech Easier article. It describes three paid tiers with no confirmation on the official site: Basic at approximately 1.40 USD per month on annual billing, Medium at 4.20 USD monthly for 10 GB and ten addresses with unlimited sending, and Pro at 8.40 USD monthly for 100 GB and one hundred addresses.
| Plan | Price (USD) | Storage | Addresses | Sending Rate | Custom Domains |
|---|---|---|---|---|---|
| Free | 0.00/month | 0.05 GB | 1 | 2/hour | 0 |
| Basic | ≈1.40/month (annual) | Not specified | Not specified | Not specified | Not specified |
| Medium | 4.20/month | 10 GB | 10 | Unlimited | Not specified |
| Pro | 8.40/month | 100 GB | 100 | Unlimited | Not specified |
Free-tier sending restrictions have drawn user complaints in 2025–2026 reviews. Paid tiers remain unverified on primary sources as of late October 2026.
Mailum supports anonymous crypto payments processed through services such as CoinPayments that accept over 50 cryptocurrencies. Users pay for upgrades or storage without linking bank accounts or credit cards.
The platform collects no KYC documents and requires no phone number at any stage of registration. An account becomes active once the chosen cryptocurrency transaction confirms on the blockchain.
Privacy-focused users gain a shorter onboarding path that avoids identity linkage common on conventional email services. The approach aligns with goals of minimizing personal data exposure, yet it still requires users to handle their own wallet security and transaction privacy when sending coins to the payment processor.
The Google Play app for Mailum lists 5K+ downloads and holds a 3.0 rating from 15 reviews as of mid-2026 data, with its most recent update dated August 14, 2025. The companion mobile experience pairs with web access that includes Tor and .onion routing for connection privacy.
Self-hosting is available through the Local Code frontend option, which lets users run the open-source client code on their own infrastructure while keeping the encrypted backend on Mailum servers in Poland.
Reviews from 2025–2026 note steady gains in message delivery reliability over prior versions, though users still report intermittent bugs. On the free tier these issues compound with the documented restriction of two outbound emails per hour and unlimited incoming messages, which limits daily workflows for anyone sending more than a handful of notes.
PGP support and the absence of external trackers remain available across all access methods, yet the low app rating and sending cap on the no-cost plan make paid tiers or self-hosted frontends more practical for frequent correspondence.
Sign up directly on the website with only an email address and password. The service requires no phone number or identity documents, and it records your IP for just five minutes during registration to prevent abuse.
Yes. Mailum accepts over 50 cryptocurrencies through processors such as CoinPayments. No KYC is needed for these payments, preserving payment anonymity.
Because the service uses zero-knowledge encryption, Mailum cannot recover your data. You must keep your own backups of recovery information; lost keys mean permanent loss of access to messages.
Servers sit in Poland, outside the 14-eyes alliance. This jurisdiction limits certain data-sharing obligations that apply inside alliance countries, though legal requests can still reach the provider.
Mailum applies zero-knowledge end-to-end encryption to the body, subject line, sender, recipient, and metadata. Many competitors encrypt only the body and leave the subject and headers visible to the server.
The app has 5K+ downloads and a 3.0 rating from 15 reviews as of mid-2026. Some users report occasional bugs, while others note improved delivery over time.
