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Fastmail Masked Email
What Fastmail Masked Email is
Fastmail Masked Email creates a separate random address for each login, keeping your real email private and making account addresses harder to link for tracking. Fastmail recommends a new alias for each site. Messages sent to aliases show a masked icon, and opening one reveals its assigned label. If an address begins receiving spam, you can disable it, which Fastmail says may help identify who exposed it. Masked Email connects with 1Password and Bitwarden, and can use a custom domain; Fastmail says its shared domain is more anonymous, while a custom domain makes addresses portable. A JMAP extension lets applications manage aliases, although API-created pending addresses are deleted after 24 hours and do not appear in the interface. Fastmail offers Android, iOS, Linux, macOS, Windows, web, and API access. Plans start at $4 a month, with a 30-day trial and no free plan. Stored data and communications are encrypted, but its own apps do not provide end-to-end encryption.
Who it suits
It suits people who want separate addresses for online accounts and control over aliases that receive spam. It also fits users needing broad device access, mailbox storage, calendar features, or integrations with password managers.
What it does well
- Creates unique aliases per login
- Aliases can be disabled when spammed
- Works with 1Password and Bitwarden
- Available across major platforms
- Supports two-step verification and passkeys
What to know first
- No free plan
- Starts at $4 a month
- Pending API aliases expire after 24 hours
- Own apps lack end-to-end encryption
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Duo | monthly · 2 users · 50 GB storage per user | $10 a month |
| Family | monthly · Up to 6 users · 50 GB storage per user | $14 a month |
| Business Basic | monthly · 5 GB mail storage · 1 GB file storage | $4 a month |
| Business Standard | monthly · 50 GB mail storage · 10 GB file storage | $6 a month |
| Business Professional | monthly · 100 GB mail storage · 50 GB file storage | $10 a month |
| Standard | 60 GB total storage per user · custom business addresses · Masked Email | On request |
| Individual | 60 GB total storage · Masked Email · 24/7 expert support | On request |
| Professional | 100 GB mail, calendar and contacts storage per user · 50 GB file storage per user · Masked Email | On request |
The first 8 of 9 plans, as fastmail.com lists them, read 21 Sept 2026. The maker's own page has the final word. Every plan
Verdict
Fastmail Masked Email separates account addresses from your real inbox and provides controls for unwanted mail. Consider the subscription cost, API expiration rule, and encryption limitation.
Facts from Fastmail Masked Email's own pages
- Account protection
- Fastmail supports two-step verification and passkeys, and says it conducts internal security audits and runs a bug bounty program. · fastmail.com, 30 Sept 2026
- Address behavior
- Masked Email addresses are random aliases intended for logins, and Fastmail suggests using a new one for each site account. · fastmail.com, 30 Sept 2026
- API
- Fastmail provides a JMAP extension that lets apps read and manage a user's Masked Email addresses. · fastmail.com, 30 Sept 2026
- API limit
- Pending masked addresses are automatically deleted 24 hours after creation and are not shown in the Fastmail interface. · fastmail.com, 30 Sept 2026
- Attachment limit
- 50 · fastmail.com, 21 Sept 2026
- Company
- Fastmail says it has operated since 1999 and is headquartered in Melbourne, Australia. · fastmail.com, 30 Sept 2026
- Custom domain
- You can use your own domain for Masked Email, though Fastmail says this is less anonymous than using its shared domain and makes addresses portable. · fastmail.com, 30 Sept 2026
- Disable addresses
- You can turn off a Masked Email address if it starts receiving spam, and Fastmail says this can help identify who leaked it. · fastmail.com, 30 Sept 2026
- Encryption limit
- Fastmail does not offer end-to-end encryption in its own apps, but says customers can use PGP or S/MIME in many third-party apps. · fastmail.com, 30 Sept 2026
- Founded
- 1999 · fastmail.com, 28 Sept 2026
- Free plan
- No · fastmail.com, 21 Sept 2026
- Headquarters
- Melbourne, Australia · fastmail.com, 28 Sept 2026
- Inbox identification
- Messages to Masked Email addresses display a masked icon, and opening one shows the label assigned to that address. · fastmail.com, 30 Sept 2026
- Integrations
- Fastmail says Masked Email can connect with 1Password and Bitwarden for smoother signups. · fastmail.com, 30 Sept 2026
- Mailbox storage
- 5 · fastmail.com, 21 Sept 2026
- Platforms
- Fastmail lists apps for Windows, macOS, Linux, iOS and Android, plus a browser app. · fastmail.com, 30 Sept 2026
- Purpose
- Masked Email creates a unique address for each login to keep your real address private and make addresses harder for companies to link for tracking. · fastmail.com, 30 Sept 2026
- Security
- Fastmail says data is encrypted at rest and communications are encrypted in transit, with support for TLS 1.3 and Perfect Forward Secrecy. · fastmail.com, 30 Sept 2026
- Support
- Fastmail says every plan includes expert human support, and its pricing page advertises 24/7 support. · fastmail.com, 30 Sept 2026
Where Fastmail Masked Email stands on Freedom251
- Personal Email Services#88 of 115