The most common Hotmail email format is {first}_{last}@mail.bg (e.g. jane_doe@mail.bg), used in about 21% of observed Hotmail work emails. Hotmail uses 8 address formats in total.
Most likely format — based on 1,050 observed addresses
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Hotmail email formats
21.1% of observed Hotmail addresses use the {first}_{last}@ format.
Email formatExampleShare
{first}_{last}@mail.bg
Examplejane_doe@mail.bg
Share21.1%
{last}@mail.bg
Exampledoe@mail.bg
Share16.0%
{f}{last}@mail.bg
Examplejdoe@mail.bg
Share15.8%
{first}{last}@mail.bg
Examplejanedoe@mail.bg
Share13.6%
{first}.{last}@mail.bg
Examplejane.doe@mail.bg
Share12.5%
{f}.{last}@mail.bg
Examplej.doe@mail.bg
Share8.3%
{first}{l}@mail.bg
Examplejaned@mail.bg
Share4.2%
{first}@mail.bg
Examplejane@mail.bg
Share4.2%
Derived from 1,050 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 Hotmail, that means testing {first}_{last}@mail.bg 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 Hotmail email format is {first}_{last}@mail.bg (for example jane_doe@mail.bg), used in about 21% of observed Hotmail work addresses. Hotmail also uses 7 other formats for name collisions.
How accurate is this Hotmail email format?
This format is derived from 1,050 real Hotmail 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 Hotmail email?
Apply the most common pattern to the person's name (e.g. jane_doe@mail.bg), 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 Hotmail use?
Beyond {first}_{last}@mail.bg, observed formats include {last}@mail.bg, {f}{last}@mail.bg, {first}{last}@mail.bg, {first}.{last}@mail.bg, {f}.{last}@mail.bg, {first}{l}@mail.bg, {first}@mail.bg, in descending order of frequency.
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