The most common Mass email format is {f}{last}@mass.co.uk (e.g. jdoe@mass.co.uk), used in about 99% of observed Mass work emails. Mass uses 3 address formats in total.
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Mass email formats
99.3% of observed Mass addresses use the {f}{last}@ format.
Email formatExampleShare
{f}{last}@mass.co.uk✓ verified
Examplejdoe@mass.co.uk
Share99.3%
{first}@mass.co.uk
Examplejane@mass.co.uk
Share0.4%
{first}{last}@mass.co.uk
Examplejanedoe@mass.co.uk
Share0.4%
Derived from 279 real observed addresses · data refreshed 2026-05-30. Role-based inboxes (info@, sales@, …) are excluded from format detection.
Verify the pattern before you send
Start with the format that appears most often. For Mass, that means testing {f}{last}@mass.co.uk first, then verifying the exact address before it reaches your CRM or sequencer. A pattern can be common and still produce bad guesses when a person uses a nickname, a middle initial, a regional mailbox, or an older alias.
VeriMails checks syntax, MX records, SMTP behavior, disposable domains, and catch-all detection so you can keep valid addresses and skip risky ones. For larger files, credits start at $19 for 10,000 verifications and never expire. Create a free account, test the pattern on a few addresses, then buy more credits only when you need volume. Run the check again before a large campaign if the list is old, because domains change mail routing and people leave.
The most common Mass email format is {f}{last}@mass.co.uk (for example jdoe@mass.co.uk), used in about 99% of observed Mass work addresses. Mass also uses 2 other formats for name collisions.
How accurate is this Mass email format?
This format is derived from 279 real Mass addresses observed across our data, not guessed. To confirm a specific address, use the live verifier above — it checks deliverability in real time.
How do I find and verify a specific person's Mass email?
Apply the most common pattern to the person's name (e.g. jdoe@mass.co.uk), then verify it on this page — or use the Find tab to get the likely address from their name automatically.
What other email formats does Mass use?
Beyond {f}{last}@mass.co.uk, observed formats include {first}@mass.co.uk, {first}{last}@mass.co.uk, in descending order of frequency.
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