Firefox Relay is the best-value alias service on price, and it isn't close. The free tier gives 50 masks with email tracker removal and a browser extension; Premium is $0.99/month, $11.88 billed yearly, adding unlimited masks, replies and a Relay subdomain. Don't SPAM Me costs a domain instead of a subscription and adds spam attribution — but the real difference is that Relay's masks live on Mozilla's domain and ours live on yours.
Comparison
| Relay Free | Relay Premium | Don't SPAM Me | |
|---|---|---|---|
| Price | $0 | $0.99/mo, $11.88/yr | $0 + your domain |
| Masks / aliases | 50 | Unlimited | Unlimited |
| Address domain | @mozmail.com | Your Relay subdomain on @mozmail.com | Your own domain |
| Create on the fly | Extension | ✓ Any word before the @ | ✓ Automatic on first mail |
| Reply from the address | ✗ | ✓ | ✗ Not yet |
| Email tracker removal | ✓ | ✓ | ✗ |
| Block promotional email | ✗ | ✓ | ✗ |
| Browser extension | ✓ | ✓ | ✗ |
| Phone masking | ✗ | +$47.88/yr tier | ✗ |
| Per-alias spam attribution | ✗ | ✗ | ✓ |
| Leak alerts naming the sender | ✗ | ✗ | ✓ |
| Availability | 34 countries | 34 countries | Anywhere you can register a domain |
| Survives leaving the provider | ✗ | ✗ | ✓ |
What Relay does better
- Price. $11.88/year is less than a domain costs in many cases, and the free tier's 50 masks is enough that plenty of people never pay at all.
- Tracker removal on the free tier. Relay strips common email trackers from forwarded mail. We don't do this, and it's a genuine privacy feature independent of aliasing.
- Replies. Premium lets you respond from the mask. We can't.
- Promotional-email blocking. Premium can block marketing mail at a mask while still passing receipts and shipping notifications through — a nicely judged feature.
- Browser extension, and phone masking as a separate tier if you want it.
- Mozilla. A non-profit-backed organisation with a long track record, which is a reasonable thing to weigh.
On features per pound, Relay wins this comparison. It would be silly to pretend otherwise.
The one structural difference
Relay Premium's subdomain feature is the closest thing to our auto-create behaviour: you get a subdomain and any word before the @ becomes a working mask instantly — shop@yourname.mozmail.com. Same convenience.
The difference is the last part of the address. mozmail.com is Mozilla's. Your subdomain sits inside it, which means the addresses depend on Relay continuing to exist and on you continuing to use it. If either changes, every address you handed out needs replacing at every service — logging in, editing, confirming via a link sent to the new address, and a support ticket for anything you can't get into.
With aliases on a domain you own, that migration is a DNS change and the addresses never move. The argument in full.
Mozilla is not about to vanish and Relay is an established product. The realistic scenarios are duller: a product gets discontinued while the organisation continues, a tier is restructured, or you simply want to move. The question isn't whether Mozilla is trustworthy — it's whether you want the answer to matter.
The second difference: attribution
Relay masks tell you nothing about what happened after you handed one out. Don't SPAM Me tracks spam per alias, alerts you by email and push when a sender that isn't the original company first emails an alias, and builds a list of which companies leaked you.
You can work this out manually with Relay by noting which mask received the spam. We do the noticing and keep the record.
Who should pick which
| If you… | Choose |
|---|---|
| Want the cheapest capable option | Firefox Relay |
| Want email trackers stripped | Firefox Relay |
| Need to reply from the address | Firefox Relay Premium |
| Want promotional mail blocked but receipts kept | Firefox Relay Premium |
| Want phone masking too | Firefox Relay |
| Live outside Relay's 34 supported countries | Don't SPAM Me |
| Want the addresses to outlive the provider | Don't SPAM Me |
| Want to know which company leaked each address | Don't SPAM Me |
| Object to subscriptions on principle | Don't SPAM Me |
The verdict
Relay is a genuinely good product and for a lot of people it's the sensible choice — particularly the free tier, which is more generous than most people realise.
Choose us if you want the namespace to be yours, if you're outside Relay's supported countries, or if attribution is the feature you actually want. Choose Relay if you want the most capability for the least money and you're comfortable with the addresses being Mozilla's to host.
More: all alias services compared · vs SimpleLogin · custom domain vs provider domain