The most common STPL email format is {last}@stpl.biz (e.g. doe@stpl.biz), used in about 96% of observed STPL work emails. STPL uses 5 address formats in total.
Most likely format — based on 182 observed addresses
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STPL email formats
96.2% of observed STPL addresses use the {last}@ format.
Email formatExampleShare
{last}@stpl.biz
Exampledoe@stpl.biz
Share96.2%
{f}{last}@stpl.biz
Examplejdoe@stpl.biz
Share1.6%
{first}@stpl.biz
Examplejane@stpl.biz
Share1.1%
{first}_{last}@stpl.biz
Examplejane_doe@stpl.biz
Share0.5%
{f}.{last}@stpl.biz
Examplej.doe@stpl.biz
Share0.5%
Derived from 182 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 STPL, that means testing {last}@stpl.biz 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 STPL email format is {last}@stpl.biz (for example doe@stpl.biz), used in about 96% of observed STPL work addresses. STPL also uses 4 other formats for name collisions.
How accurate is this STPL email format?
This format is derived from 182 real STPL 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 STPL email?
Apply the most common pattern to the person's name (e.g. doe@stpl.biz), 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 STPL use?
Beyond {last}@stpl.biz, observed formats include {f}{last}@stpl.biz, {first}@stpl.biz, {first}_{last}@stpl.biz, {f}.{last}@stpl.biz, in descending order of frequency.
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