The most common Yubico email format is {first}@yubico.com (e.g. jane@yubico.com), used in about 55% of observed Yubico work emails. Yubico uses 5 address formats in total.
Verified format
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Yubico email formats
55.1% of observed Yubico addresses use the {first}@ format.
Email formatExampleShare
{first}@yubico.com✓ verified
Examplejane@yubico.com
Share55.1%
{f}{last}@yubico.com
Examplejdoe@yubico.com
Share36.5%
{first}.{last}@yubico.com
Examplejane.doe@yubico.com
Share7.1%
{f}.{last}@yubico.com
Examplej.doe@yubico.com
Share0.6%
{last}@yubico.com
Exampledoe@yubico.com
Share0.6%
Derived from 156 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 Yubico, that means testing {first}@yubico.com 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 Yubico email format is {first}@yubico.com (for example jane@yubico.com), used in about 55% of observed Yubico work addresses. Yubico also uses 4 other formats for name collisions.
How accurate is this Yubico email format?
This format is derived from 156 real Yubico 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 Yubico email?
Apply the most common pattern to the person's name (e.g. jane@yubico.com), 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 Yubico use?
Beyond {first}@yubico.com, observed formats include {f}{last}@yubico.com, {first}.{last}@yubico.com, {f}.{last}@yubico.com, {last}@yubico.com, in descending order of frequency.
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