Masked email address finder: spot Apple, Firefox and DuckDuckGo relay addresses
In short: Upload a list with an Email column. Addresses on the relay domains of Apple Hide My Email, Firefox Relay, DuckDuckGo Email Protection, SimpleLogin and addy.io are tagged by service, and you download them or the rest. Limit: It matches the shared relay domains listed on the page and nothing else.
Upload the list and the tool compares each domain with the relay domains of Apple Hide My Email, Firefox Relay, DuckDuckGo Email Protection, SimpleLogin and addy.io. A match is a masked address that forwards to a real inbox the person chose not to share. Download the masked rows, the rest, or the whole list with a service column.
Price: this tool is free. Checking a whole email list is from $9/mo, and the first 100 checks are free with Google, no card. Check your list free nowSee pricing
Sample result
Six example rows: 5 masked addresses found and 1 other.
- Masked found
- 5
- Rows read
- 6
- Services found
- 5
What this means for you
Each masked address is tagged with the relay service it belongs to.
- Apple, Firefox, DuckDuckGo
- SimpleLogin and addy.io
- Relay domains from each service
- Masked rows or the rest
- Masked email
- Relay domains
- Lead list
By SimpleVerifier Team · Last updated · Runs in your browser; nothing you paste is sent to us
Masked rows found, now check the rest.
- Download the list without the masked rows, or use the check button under the result.
- Upload or paste it at /verify. Every address gets a live mailbox check, and the first 100 email checks are free with a Google sign-in, no card.
How do I find masked email addresses in a list?
- Upload the .xlsx or CSV, or paste the cells with the header row first. It needs an Email column.
- Read the counts and the table of services found.
- Download the masked addresses, the list without them, or the whole list with masked_group and masked_note columns added.
- Check the rows you keep before you send.
Example
- You enter
- Example list of six addresses on privaterelay.appleid.com, duck.com, mozmail.com, anonaddy.me, simplelogin.co and example.com.
- You get
- Six rows read: 5 masked addresses and 1 other. One each is found for Apple Hide My Email, DuckDuckGo Email Protection, Firefox Relay, addy.io and SimpleLogin; example.com is not found.
- Limits
- Runs in your browser; nothing is uploaded.
Which services does it recognise?
Apple Hide My Email (privaterelay.appleid.com, private.icloud.com); Firefox Relay (mozmail.com); DuckDuckGo Email Protection (duck.com); SimpleLogin (simplelogin.co); addy.io (AnonAddy) (anonaddy.com, anonaddy.me). Each domain was taken from the service's own help pages. Firefox Relay masks can also sit on a custom subdomain of mozmail.com, and those are found too.
What is a masked address?
A relay address is a random or chosen address that forwards mail to the person's real inbox. People create them on sign-up forms so the site never sees the real address. Mail you send to one is forwarded, and the person can switch the address off at any time, after which mail to it stops arriving.
It is not the same as a disposable address, which is built to be thrown away. Run those through the bulk disposable email checker.
What does it not find?
Masked addresses on a person's own domain, on a paid custom relay domain, or on a provider's own domain (such as a random-word address on a mailbox provider) look like ordinary addresses and are not found. The list covers the shared relay domains above, and it does not change when a service adds a domain.
Who uses this tool, and for what?
- Cold email senders
- Set aside addresses where the person has chosen not to share a real inbox.
- Marketing teams
- Find sign-ups that used a relay so you can treat their engagement data with care.
- Sales ops
- Tag masked rows before matching them to an account by domain.
What can’t this tool tell you?
- It matches the shared relay domains listed on the page and nothing else.
- A masked address on a custom domain looks like any other address.
- A masked address says nothing about whether the forward is still switched on.
- New relay domains added by a service are not found until this list is updated.
Common questions
- Does a masked address bounce?
- It can, if the person has switched the address off. The tool only finds the address; checking is a separate step.
- Does it find Apple Hide My Email?
- Yes, on privaterelay.appleid.com and private.icloud.com.
- Does it find Gmail plus addresses?
- No. For those use the plus address checker.
- Should I remove masked addresses?
- That is your call. They reach a real inbox but the person chose not to share it, so a cold message is less likely to be welcome.
- Can I keep only the masked rows?
- Yes. Download the masked addresses file.
- Is my list uploaded anywhere?
- No. It is read in your browser.
A tidy list can still be full of dead addresses.
Extracting, deduplicating and syntax checks all work on the text of an address. None of them can tell whether the mailbox exists. Only the server that hosts it can answer that, through an SMTP check, and that is what the paid product does.
- Upload the cleaned file as it is: CSVs up to 100,000 rows
- A real SMTP mailbox check on every row, with catch-all detection
- Small list? Starter at $9/mo covers 2,500 emails a month, cancel anytime
Plans from $9 a month, cancel anytime, no contract. Sign in with Google and your first 100 email checks are free, no card. The free tools stay free either way.