Fastmail Masked Email

Plans and prices

Every plan, in full

On the record

Account protection

Fastmail supports two-step verification and passkeys, and says it conducts internal security audits and runs a bug bounty program.fastmail.com · read 30 Sep 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 · read 30 Sep 2026

API

Fastmail provides a JMAP extension that lets apps read and manage a user's Masked Email addresses.fastmail.com · read 30 Sep 2026

API limit

Pending masked addresses are automatically deleted 24 hours after creation and are not shown in the Fastmail interface.fastmail.com · read 30 Sep 2026

Attachment limit

50fastmail.com · read 21 Sep 2026

Company

Fastmail says it has operated since 1999 and is headquartered in Melbourne, Australia.fastmail.com · read 30 Sep 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 · read 30 Sep 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 · read 30 Sep 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 · read 30 Sep 2026

Inbox identification

Messages to Masked Email addresses display a masked icon, and opening one shows the label assigned to that address.fastmail.com · read 30 Sep 2026

Integrations

Fastmail says Masked Email can connect with 1Password and Bitwarden for smoother signups.fastmail.com · read 30 Sep 2026

Mailbox storage

5fastmail.com · read 21 Sep 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 · read 30 Sep 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 · read 30 Sep 2026

Support

Fastmail says every plan includes expert human support, and its pricing page advertises 24/7 support.fastmail.com · read 30 Sep 2026

Alternatives to Fastmail Masked Email

ZM Zoho MailAndroidiPhone & iPad+6 G GmailAndroidiPhone & iPad+1 OC Outlook.comAndroidiPhone & iPad+1 PM Proton MailAndroidiPhone & iPad+4 FE Fastmail EmailAndroidiPhone & iPad+5 EM eclipso Mail EuropeAndroidiPhone & iPad+3 T ThelemailAndroidiPhone & iPad+2 IL Inbox.lvAndroidiPhone & iPad+1

Every alternative, ranked