How to Find Masked Email Addresses (Hide My Email, Relay) in a List
A masked address is one on a relay domain that forwards to a real inbox the person chose not to share. The masked email address finder compares each domain in your list with the relay domains of Apple Hide My Email, Firefox Relay, DuckDuckGo Email Protection, SimpleLogin and addy.io. Upload a file and download the masked rows, the rest, or the whole list with a service column. The list is read in your browser.
Step 1: upload the list
Upload the .xlsx or CSV, or paste the cells with the header row first. It needs an Email column.
Step 2: read the counts
You get the number of masked addresses and a table of which services were found. By hand, the same idea is a filter on the domain: Apple's relay addresses end in privaterelay.appleid.com or private.icloud.com.
Step 3: choose what to download
| File | Use it for |
|---|---|
| Masked addresses | Review them or tag them |
| List without masked rows | A list for cold outreach |
| Whole list with masked_group and masked_note columns | Keep everything, filter later |
A match tells you the person used a relay. It does not tell you the relay still works. Someone can switch a forward off, and the address then bounces or goes nowhere.
What to do with the rows you keep
Masked addresses are real inboxes, but a cold message to someone who deliberately hid their address is less likely to be welcome. For engagement data from sign-ups, treat opens and clicks with care. Related lists: finding disposable emails in a list and blocking disposable emails at signup. For Gmail's tagged addresses, see where a plus address is delivered.
What this check cannot do
- It matches only the shared relay domains listed on the page.
- A masked address on a custom domain looks like any other address.
- A match says nothing about whether the forward is still switched on.
- New relay domains are not found until the list is updated.
Check the rest of the list
Masked rows found, now check the others. Upload the list without the masked rows on the verify page: the first 100 email checks are free with a Google sign-in, no card. Each address comes back valid, risky or invalid with a reason such as "Mailbox exists", "Mailbox not found" or "Disposable address". See bulk email verification and pricing.
Find masked addresses now
Upload your list to the masked email address finder.
Common questions
Does a masked address bounce?
It can, if the person has switched the forward off. The tool only finds the address; checking whether it works 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.
Is my list uploaded?
No. It is read in your browser.
Check your list before you send
Real mailbox checks over SMTP, and nothing is sent to the address. Sign in with Google and your first 100 email checks are free, no card. Plans for bigger lists are on the pricing page.