33Mail
33Mail creates private email aliases and forwards messages sent to them to an existing email address.
What 33Mail is
33Mail creates private email aliases and forwards messages sent to them to an existing email address. An alias is created automatically when its first message arrives, and users can block aliases to stop receiving further email through them. With anonymous replies activated, users can respond to forwarded messages through 33Mail, which removes header information tied to their actual email address. Premium accounts can use a custom domain by pointing its MX record to 33Mail. The service is web-based and also lists a browser extension. Lite is free, with 10MB monthly bandwidth and alias creation capped at five per 30-minute period. Premium costs $1 per month and includes 50MB monthly bandwidth, 20 anonymous replies per day, one custom domain, and one additional username. Pro is $5 per month; Enterprise is $50 per month, with higher bandwidth and reply allowances. Attachments up to 10MB count toward monthly bandwidth, measured across a rolling 30-day window. 33Mail says it sends a warning when a bandwidth limit is exceeded and treats dropping emails as a last resort. It was conceived by brothers Ian and Andrew Clarke, and forwarded its first email in August 2010.
Good
- Aliases are created automatically when first used
- Users can block aliases
- Anonymous replies remove identifying header information
- Free plan includes 10MB monthly bandwidth
Watch out
- Free alias creation is limited to five per 30 minutes
- Attachments up to 10MB count toward bandwidth
- Sending mail from an alias is not supported
Who it suits
33Mail suits people who want to forward mail through separate aliases and block aliases when needed. Premium and higher plans may suit users who want custom domains or anonymous replies.
Verdict
33Mail provides a simple way to forward messages through aliases and manage incoming mail by blocking addresses. Consider the bandwidth limits and the fact that it supports replying from aliases, not sending from them.
Plans and prices
From 33Mail's own pricing page, checked 5 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Lite | Free | 10MB monthly bandwidth · aliases limited to 5 per 30-minute period |
| Premium | $1 a month | 50MB monthly bandwidth · 20 anonymous replies/day · 1 custom domain · 1 additional username · $1 per month |
| Pro | $5 a month | 500MB monthly bandwidth · 100 anonymous replies/day · 5 custom domains · 5 additional usernames · $5 per month |
| Enterprise | $50 a month | 5GB monthly bandwidth · 1000 anonymous replies/day · unlimited custom domains · 25 additional usernames · $50 per month |
The facts
Each one read from 33Mail's own pages, with the date it was checked.
What it does
- Alias controls
- Users can block an alias to stop receiving its email.checked 5 Oct 2026
- Alias creation
- Aliases are created automatically when an email is first sent to them.checked 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.checked 5 Oct 2026
- Attachments
- Forwarded emails can include attachments up to 10MB, which count toward monthly bandwidth.checked 5 Oct 2026
- Bandwidth window
- Bandwidth limits are calculated over a rolling 30-day window.checked 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.checked 5 Oct 2026
- Custom domains
- Premium accounts can use a custom domain by pointing its MX record to 33Mail.checked 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.checked 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.checked 5 Oct 2026
- Service
- 33Mail creates private email aliases and forwards their messages to an existing email address.checked 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.checked 5 Oct 2026
The company
- Founded
- 2010checked 28 Sep 2026
- History and makers
- The about page says brothers Ian and Andrew Clarke conceived 33Mail, which forwarded its first email in August 2010.checked 5 Oct 2026
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