33Mail invented the model we use — any address at your subdomain works instantly, with nothing to pre-create. It's been running since 2011, the free tier gives unlimited aliases, and Premium is $1/month. The catch is bandwidth: 10MB a month free, 50MB on Premium, which HTML newsletters eat quickly. We have no bandwidth cap and put the addresses on your own domain, but we can't reply and they can.
Feature comparison
| 33Mail Lite | 33Mail Premium | 33Mail Pro | Don't SPAM Me | |
|---|---|---|---|---|
| Price | $0 | $1/month | $5/month | $0 + your domain |
| Aliases | Unlimited | Unlimited | Unlimited | Unlimited |
| Aliases auto-create on first mail | ✓ | ✓ | ✓ | ✓ |
| Address domain | you.33mail.com | 1 custom domain | 5 custom domains | Yours, required |
| Bandwidth | 10MB/month | 50MB/month | 500MB/month | No published limit |
| Anonymous replies | ✗ | ✓ 20/day | ✓ 100/day | ✗ Not yet |
| Extra usernames | ✗ | 1 | 5 | — |
| Block an alias | ✓ From the email | ✓ | ✓ | ✓ Hard SMTP 550 |
| Ads | Yes | No | No | No |
| Mobile app | ✗ | ✗ | ✗ | iOS |
| Per-alias spam attribution | ✗ | ✗ | ✗ | ✓ |
| Leak alerts naming the new sender | ✗ | ✗ | ✗ | ✓ |
| Operating since | 2011 | 2026 | ||
The thing 33Mail got right first
Worth saying plainly: 33Mail has been doing catch-all aliasing since 2011, which is before most of this category existed, and the interaction model is the one we consider correct.
You get a subdomain — you.33mail.com — and any address at it works the moment mail arrives. No extension, no app, no pre-creating an alias before you can use it. Standing at a checkout form you invent bbqtrading@you.33mail.com and it works. That is the same behaviour as ours, and it's the reason both products need far less software than services built around an alias-creation step.
Their block flow is also good: a link in the forwarded email itself kills the alias, so cutting off a sender takes one click from the message that annoyed you rather than a trip to a dashboard.
Where 33Mail is better
- It works with no domain. The free subdomain means you can start in about a minute. We require you to own or register a domain first, which is a real barrier and a real cost.
- Anonymous replies from $1/month. We don't support replying at any price. Theirs is the cheapest reply support in this entire category.
- Fifteen years of operation. For something sitting in the delivery path of your mail, that history is a legitimate reason to prefer them over a service that launched this year.
- Multiple usernames. Premium and above let you run separate subdomains, which is a clean way to keep work and personal aliases apart.
Where Don't SPAM Me is different
No bandwidth cap
This is the difference that decides it for most people, and it's easy to underestimate. 10MB a month on the free tier is very tight — a single retailer's HTML newsletter with images runs to a few hundred kilobytes, so a couple of dozen a month exhausts it. Premium's 50MB is better and still finite.
Bandwidth caps are awkward specifically because they punish the use case aliases exist for. You hand out addresses to shops and newsletters; shops and newsletters send image-heavy mail; the cap arrives exactly where you're using the product hardest. We publish no bandwidth limit.
The addresses are on your domain by default
33Mail's free tier puts aliases on you.33mail.com, so leaving means re-addressing everything. Custom domains start at Premium, which is only $1/month — genuinely cheap — but it's a paid feature there and the only mode here. If you're going to pay $12/year for a custom domain anyway, the domain itself costs about the same and you keep it independently of the service.
Attribution
Both let you see which alias received the spam, because that's inherent to per-service addresses. We add the alerting layer: an email and push notification naming the new sender's domain the first time an alias receives mail from someone other than the company you gave it to, plus a running list of which companies did it. How the trail works.
How to choose
| If you… | Choose |
|---|---|
| Don't want to own a domain | 33Mail |
| Need to reply from an alias cheaply | 33Mail Premium |
| Want the longest track record | 33Mail |
| Want to start in under a minute | 33Mail Lite |
| Receive a lot of image-heavy newsletters | Don't SPAM Me |
| Want addresses that outlive the service | Don't SPAM Me |
| Want alerting when an alias is passed on | Don't SPAM Me |
| Want an iOS app | Don't SPAM Me |
The verdict
33Mail is an under-rated service that has quietly done the right thing for fifteen years, and at $1/month for custom domains and replies it undercuts every mainstream option including the free ones on features-per-dollar.
Test it against one number: how much mail do you actually receive at these addresses? If the answer is "a handful of transactional messages", 33Mail's caps will never trouble you and its reply support and price make it the better buy. If the answer is "every newsletter and every shop I've ever used", you will hit the bandwidth ceiling, and that's the case for something uncapped.
The portability point applies to both once you're on a custom domain: whichever you pick, switching later is a DNS change rather than re-addressing every account you own.
More: vs SimpleLogin · vs Forward Email · subdomain aliases vs catch-all