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Fastmail Masked Email

fastmail.com

From $4/mo Free trial WebWindowsmacOSLinuxiOSAndroid
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Spec score 8.9 #11 of 115 in Personal Email Services

What it is

Fastmail Masked Email creates a random email alias for each login, letting users give a site an address other than their real one. Using separate aliases can make it harder for companies to connect accounts for tracking. Messages to these addresses arrive in Fastmail; a masked icon marks them, and opening a message shows the label assigned to the address. An alias can be turned off if it starts receiving spam, which Fastmail says may help identify who exposed it. Users can connect Masked Email with 1Password or Bitwarden, or use their own domain; Fastmail says a custom domain is less anonymous than its shared domain but makes addresses portable. A JMAP extension lets apps read and manage addresses, though pending API-created aliases are deleted after 24 hours and do not appear in the interface. Fastmail supports two-step verification and passkeys and encrypts stored data and communications. Its own apps do not offer end-to-end encryption. Plans start at $4 a month, and a 30-day trial is available; there is no free plan. Access is available on Android, iOS, Linux, macOS, Windows, and the web.

Spec sheet

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.Read 30 Sep 2026 · fastmail.com
Platforms
Fastmail lists apps for Windows, macOS, Linux, iOS and Android, plus a browser app.Read 30 Sep 2026 · fastmail.com
Free plan
NoRead 21 Sep 2026 · fastmail.com
API
Fastmail provides a JMAP extension that lets apps read and manage a user's Masked Email addresses.Read 30 Sep 2026 · fastmail.com
Integrations
Fastmail says Masked Email can connect with 1Password and Bitwarden for smoother signups.Read 30 Sep 2026 · fastmail.com
Security
Fastmail says data is encrypted at rest and communications are encrypted in transit, with support for TLS 1.3 and Perfect Forward Secrecy.Read 30 Sep 2026 · fastmail.com
Support
Fastmail says every plan includes expert human support, and its pricing page advertises 24/7 support.Read 30 Sep 2026 · fastmail.com
Headquarters
Melbourne, AustraliaRead 28 Sep 2026 · fastmail.com
Founded
1999Read 28 Sep 2026 · fastmail.com
Company
Fastmail says it has operated since 1999 and is headquartered in Melbourne, Australia.Read 30 Sep 2026 · fastmail.com
Account protection
Fastmail supports two-step verification and passkeys, and says it conducts internal security audits and runs a bug bounty program.Read 30 Sep 2026 · fastmail.com
Address behavior
Masked Email addresses are random aliases intended for logins, and Fastmail suggests using a new one for each site account.Read 30 Sep 2026 · fastmail.com
API limit
Pending masked addresses are automatically deleted 24 hours after creation and are not shown in the Fastmail interface.Read 30 Sep 2026 · fastmail.com
Attachment limit
50Read 21 Sep 2026 · fastmail.com
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.Read 30 Sep 2026 · fastmail.com
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.Read 30 Sep 2026 · fastmail.com
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.Read 30 Sep 2026 · fastmail.com
Inbox identification
Messages to Masked Email addresses display a masked icon, and opening one shows the label assigned to that address.Read 30 Sep 2026 · fastmail.com
Mailbox storage
5Read 21 Sep 2026 · fastmail.com

Plans and prices

Basic $4 a month monthly 5 GB mail storage · 1 GB file storage · 600 aliases plus 15 per user Read 21 Sep 2026 · fastmail.com
Individual $6 a month monthly 50 GB mail storage · 10 GB file storage Read 21 Sep 2026 · fastmail.com
Duo $10 a month monthly 2 users · 50 GB storage per user Read 21 Sep 2026 · fastmail.com
Family $14 a month monthly Up to 6 users · 50 GB storage per user Read 21 Sep 2026 · fastmail.com
Business Basic $4 a month monthly 5 GB mail storage · 1 GB file storage Read 21 Sep 2026 · fastmail.com
Business Standard $6 a month monthly 50 GB mail storage · 10 GB file storage Read 21 Sep 2026 · fastmail.com
Business Professional $10 a month monthly 100 GB mail storage · 50 GB file storage Read 21 Sep 2026 · fastmail.com
Basic Price not published 6 GB total storage per user · 24/7 expert support Read 30 Sep 2026 · fastmail.com
Individual Price not published 60 GB total storage · Masked Email · 24/7 expert support Read 30 Sep 2026 · fastmail.com
Professional Price not published 100 GB mail, calendar and contacts storage per user · 50 GB file storage per user · Masked Email Read 30 Sep 2026 · fastmail.com
Standard Price not published 60 GB total storage per user · custom business addresses · Masked Email Read 30 Sep 2026 · fastmail.com

Every Fastmail Masked Email plan and price →

Strong points and limits

Strong points

  • Creates a separate random alias for each login.
  • Aliases can be turned off.
  • Connects with 1Password and Bitwarden.
  • Supports two-step verification and passkeys.
  • Available across mobile, desktop, and web.

Limits

  • No free plan is available.
  • Fastmail’s own apps lack end-to-end encryption.
  • Pending API aliases disappear after 24 hours.
  • Custom-domain aliases are less anonymous, Fastmail says.

Who it suits

Masked Email suits Fastmail users who want a distinct address for each site login and the option to disable an alias that attracts spam. It may also fit users who want aliases managed through 1Password, Bitwarden, or the JMAP extension.

Verdict

Masked Email separates site logins from a user’s real address and includes controls for managing aliases. The service is part of paid Fastmail plans, so consider the trial and the encryption limitation before signing up.

Where Specifiction places it

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