The most common Esp email format is {f}{last}@espinc1.com (e.g. jdoe@espinc1.com), used in about 99% of observed Esp work emails. Esp uses 3 address formats in total.
Verified format
Find anyone’s Esp email
Enter a name — Esp’s email pattern is in our data, so we can find the address. Start free to reveal & verify it.
Full finder is 20 credits · verification is 1 credit. Powered by the VeriMails engine.
Esp email formats
99.0% of observed Esp addresses use the {f}{last}@ format.
Email formatExampleShare
{f}{last}@espinc1.com✓ verified
Examplejdoe@espinc1.com
Share99.0%
{first}{last}@espinc1.com
Examplejanedoe@espinc1.com
Share0.5%
{first}.{last}@espinc1.com
Examplejane.doe@espinc1.com
Share0.5%
Derived from 206 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 Esp, that means testing {f}{last}@espinc1.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 Esp email format is {f}{last}@espinc1.com (for example jdoe@espinc1.com), used in about 99% of observed Esp work addresses. Esp also uses 2 other formats for name collisions.
How accurate is this Esp email format?
This format is derived from 206 real Esp 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 Esp email?
Apply the most common pattern to the person's name (e.g. jdoe@espinc1.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 Esp use?
Beyond {f}{last}@espinc1.com, observed formats include {first}{last}@espinc1.com, {first}.{last}@espinc1.com, in descending order of frequency.
Was this helpful?
Find and verify work emails at any company
Build a verified prospect list one company at a time — find the right address, confirm it’s deliverable, then reach out with confidence.