Swiss end-to-end encrypted email with a free tier; paid plans payable in Bitcoin or cash
Privacy 7.2
Safety 7.3
Email Reviewed 22 Oct 2026
Mailum review
Encrypted webmail with no phone or ID at signup; formerly branded CyberFear
- No account needed
- Accepts Monero
- Tor onion address
- Open source
- No-logs policy
- Nobody accountable
No ID mentioned KYC 1 Documentation reviewed
Privacy
7.8/ 10
Strong
Safety
5.4/ 10
Caution
Based on terms and documentation. No test transactions published yet. See the arithmetic
Mailum review in short
Mailum is an email provider. Its terms put it at KYC level 1 of 4: no ID mentioned. NoKYC Score grades it 7.8/10 for privacy (strong) and 5.4/10 for safety (caution). In its favour: no account needed, no email needed and no phone number. To watch: it has no publicly accountable operator. No incidents are on record.
- Category
- KYC level
- 1 of 4: No ID mentioned
- Grades
- Privacy 7.8/10, Safety 5.4/10
- Sign-up
- No account needed
- Fees
- Free plan with 0.05 GB; paid plans from $2/month
- Limits
- Free plan limited to 2 sent emails per hour
- Onion address
- Yes
- Incidents on record
- 0
- Last reviewed
- 22 Oct 2026
Cite this review
NoKYC Score, "Mailum review", reviewed 22 Oct 2026, https://nokycscore.com/service/mailum
Also available as plain text.
What Mailum is
Mailum is an encrypted webmail service that is also reachable under its CyberFear name, whose signup and pricing links lead to the same Mailum mailbox. It claims end-to-end, zero-access encryption so that the operator cannot read stored mail, publishes its client code on GitHub and says its servers are in Poland. The privacy policy says IP addresses are not logged apart from a five-minute anti-flood record at registration, and that only a hashed username and the day of last login are held. The CyberFear features page says no ID or phone number is asked for and that over 50 cryptocurrencies including BTC and XMR are accepted. Both domains announce onion addresses; no company is named.
What Mailum offers, and what to watch
7 of 14 privacy and safety features, 1 warning in its terms.
"Not stated" means its own pages do not say.
Identity
- ID never required Not stated
- No account needed Yes Usable without creating an account, or the account is only a random number.
- No email needed Yes An email address is not required to sign up or use it.
- No phone number Yes A phone number is never required.
Payment
- Accepts Monero Yes Monero hides sender, receiver and amount, so the payment cannot be traced to you.
- Accepts Lightning Not stated
- Accepts cash Not stated
Access
- Tor onion address Yes An official .onion address, reachable only through Tor.
- Works without JavaScript Not stated
Trust
- Open source Yes The code that matters is public and can be inspected.
- No-logs policy Yes States that connection or activity logs are not kept.
- Independent audit Not stated
- Company named No
- 5+ years operating Not stated
Warnings
- May ask for ID Not in terms
- Email required Not in terms
- Phone number required Not in terms
- Closed source Not in terms
- Nobody accountable Yes No company or person is publicly responsible for the service.
Does Mailum require KYC?
- 0 Never
- 1 Not mentioned
- 2 Rare
- 3 On risk flag
- 4 Mandatory
KYC level 1: No ID mentioned. No identity requirement appears anywhere in the terms or documentation.
Terms are silent on identity; the operator's features page says "We will not ask you for your ID and we will not force you to add a phone number."
How the grades add up
Both grades start at 50 points and move by fixed, published amounts. Nothing is adjusted by hand. The total is divided by ten.
Privacy
7.8- Starting points 50
- KYC level 1: No ID mentioned +12
- No email needed +3
- No phone needed +1
- Tor onion service +4
- Accepts Monero +4
- Open source +2
- No-logs policy +2
- Total, clamped to 0–100 78
Safety
5.4- Starting points 50
- Open source +8
- Anonymous operator -4
- Total, clamped to 0–100 54
Test ledger
Real transactions run by our editors. A badge without a ledger is an assertion; this is the proof.
No test transactions published yet
The grades above rest on Mailum’s terms and documentation. Tests will appear here with the date, route, amount band and result as they are run.
Incidents on record
No incidents are on record for Mailum. If you have a documented case, report it.
User reviews
Reviews never change a grade. Reviews with a transaction reference are marked.
No reviews yet.
Write a review
Create an account to write a review. It takes ten seconds and needs no email: you get a random key and a random name. Already have a key? Sign in.
Alternatives to Mailum
All alternatives → 
German encrypted email and calendar with open-source clients and a free tier
Privacy 6.5
Safety 7.3
Berlin email provider at €1/month that separates payments from accounts; takes cash
Privacy 7.8
Safety 6.5
Email with an official onion address, PGP storage encryption and anonymous signup
Privacy 7.4
Safety 6.5
Mailum vs Proton MailMailum vs TutaMailum vs PosteoMailum vs Onion Mail
Mailum: common questions
Does Mailum require KYC?
Mailum is rated KYC level 1 of 4 on this site: no ID mentioned. Terms are silent on identity; the operator's features page says "We will not ask you for your ID and we will not force you to add a phone number."
Is Mailum safe to use?
Mailum has a Safety grade of 5.4 out of 10 and a Privacy grade of 7.8 out of 10. No incidents are on record. Evidence level: documentation reviewed.
Is Mailum legit?
Mailum is a working email provider. Its operators do not publish a company or names, so nobody is publicly accountable for it. Being real is not the same as being safe: its Safety grade here is 5.4 out of 10, built from custody, liquidity, track record and incidents.
Is Mailum a scam?
NoKYC Score does not label services as scams; it records documented incidents with their sources and outcomes. No incidents are on record for Mailum.
Do I need an account or email to use Mailum?
No account needed.
What fees does Mailum charge?
Free plan with 0.05 GB; paid plans from $2/month. Fees were recorded from Mailum's own pages and can change; check before you send.
What are Mailum's limits?
Free plan limited to 2 sent emails per hour.
Does Mailum have a Tor onion address?
Yes. Mailum publishes an official onion address, shown on this page. Open it in Tor Browser.
Which cryptocurrencies does Mailum support?
Mailum supports BTC, XMR.
Can I use Mailum over Tor?
Yes. Mailum publishes an official onion address, shown on this page.
Listing history
- Listing added. Facts and KYC level set from the service's own terms and documentation.