The most common Which email format is {first}.{last}@which.co.uk (e.g. jane.doe@which.co.uk), used in about 97% of observed Which work emails. Which uses 7 address formats in total.
Most likely format — based on 537 observed addresses
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Which email formats
97.4% of observed Which addresses use the {first}.{last}@ format.
Email formatExampleShare
{first}.{last}@which.co.uk
Examplejane.doe@which.co.uk
Share97.4%
{last}@which.co.uk
Exampledoe@which.co.uk
Share0.7%
{f}.{last}@which.co.uk
Examplej.doe@which.co.uk
Share0.7%
{first}{last}@which.co.uk
Examplejanedoe@which.co.uk
Share0.6%
{first}{l}@which.co.uk
Examplejaned@which.co.uk
Share0.2%
{f}{last}@which.co.uk
Examplejdoe@which.co.uk
Share0.2%
{first}_{last}@which.co.uk
Examplejane_doe@which.co.uk
Share0.2%
Derived from 537 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 Which, that means testing {first}.{last}@which.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 Which email format is {first}.{last}@which.co.uk (for example jane.doe@which.co.uk), used in about 97% of observed Which work addresses. Which also uses 6 other formats for name collisions.
How accurate is this Which email format?
This format is derived from 537 real Which 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 Which email?
Apply the most common pattern to the person's name (e.g. jane.doe@which.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 Which use?
Beyond {first}.{last}@which.co.uk, observed formats include {last}@which.co.uk, {f}.{last}@which.co.uk, {first}{last}@which.co.uk, {first}{l}@which.co.uk, {f}{last}@which.co.uk, {first}_{last}@which.co.uk, in descending order of frequency.
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