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33Mail
What it is
33Mail creates private email aliases and forwards messages sent to them to an existing email address. An alias is created automatically the first time it receives mail, and users can block aliases to stop further messages. When anonymous replies are enabled, users can respond to forwarded mail through 33Mail; the service removes header information related to their actual email address. Premium accounts can use a custom domain by directing its MX record to 33Mail. The service is web-based and also lists a browser extension. Lite is free, with 10MB monthly bandwidth and a limit of five aliases per 30-minute period. Premium costs $1 a month and includes 50MB monthly bandwidth, 20 anonymous replies per day, one custom domain and one additional username. Pro is $5 a month, while Enterprise is $50 a month, with higher bandwidth and reply allowances. Attachments up to 10MB count toward bandwidth, which is calculated over a rolling 30-day window. 33Mail says it warns users who exceed their bandwidth allowance and treats dropping emails as a last resort. Its terms say user data is not shared with third parties except as needed to comply with law enforcement requests.
For and against
For
- Aliases are created automatically when first used.
- Users can block aliases.
- Anonymous replies remove identifying header information.
- Premium supports a custom domain.
- The service offers a free Lite plan.
Against
- Lite includes 10MB monthly bandwidth.
- Lite allows five aliases per 30-minute period.
- Attachments up to 10MB count toward bandwidth.
- Sending from an alias is not supported.
The verdict
33Mail provides automatically created forwarding aliases, blocking controls and anonymous replies. Its bandwidth limits, alias creation caps and tier-specific allowances are key plan details to consider.
Who it suits
33Mail may suit people who want to use separate email addresses that forward to an existing inbox and reply without exposing related header information. Users with higher mail volume or custom-domain needs can consider the paid tiers.
Plans and prices
Lite
10MB monthly bandwidth · aliases limited to 5 per 30-minute period
Read 5 Oct 2026 · 33mail.com
Premium
50MB monthly bandwidth · 20 anonymous replies/day · 1 custom domain · 1 additional username
Read 5 Oct 2026 · 33mail.com
Pro
500MB monthly bandwidth · 100 anonymous replies/day · 5 custom domains · 5 additional usernames
Read 5 Oct 2026 · 33mail.com
Enterprise
5GB monthly bandwidth · 1000 anonymous replies/day · unlimited custom domains · 25 additional usernames
Read 5 Oct 2026 · 33mail.com
On the record
- Alias controls
- Users can block an alias to stop receiving its email.33mail.com · read 5 Oct 2026
- Alias creation
- Aliases are created automatically when an email is first sent to them.33mail.com · read 5 Oct 2026
- Anonymous replies
- With anonymous replies activated, users can reply to forwarded mail through 33Mail, which removes header information relating to their actual email address.33mail.com · read 5 Oct 2026
- Attachments
- Forwarded emails can include attachments up to 10MB, which count toward monthly bandwidth.33mail.com · read 5 Oct 2026
- Bandwidth window
- Bandwidth limits are calculated over a rolling 30-day window.33mail.com · read 5 Oct 2026
- Creation limits
- The FAQ states alias creation is limited to 5 per 30 minutes for Lite, 20 for Premium, and 50 for Pro.33mail.com · read 5 Oct 2026
- Custom domains
- Premium accounts can use a custom domain by pointing its MX record to 33Mail.33mail.com · read 5 Oct 2026
- Data policy
- The terms say 33Mail will not share user data with third parties except as necessary to comply with law enforcement requests, and will use it to provide the service.33mail.com · read 5 Oct 2026
- History and makers
- The about page says brothers Ian and Andrew Clarke conceived 33Mail, which forwarded its first email in August 2010.33mail.com · read 5 Oct 2026
- Over-limit handling
- 33Mail says it will send a warning if a user exceeds the bandwidth limit and treats dropping emails as a last resort.33mail.com · read 5 Oct 2026
- Service
- 33Mail creates private email aliases and forwards their messages to an existing email address.33mail.com · read 5 Oct 2026
- Support
- The help page offers email support for feature requests and problem reports and directs users to send a direct message to @33mail on Twitter.33mail.com · read 5 Oct 2026
