EmailKit can verify virtually any email address. Here's a breakdown of the types of emails you can check and what to expect.
EmailKit can verify addresses from major personal email providers:
Gmail (gmail.com) — Highly accurate results
Outlook/Hotmail (outlook.com, hotmail.com, live.com) — Highly accurate results
Yahoo (yahoo.com, ymail.com) — Accurate results
ProtonMail (protonmail.com, proton.me) — Limited verification possible
iCloud (icloud.com, me.com) — Accurate results
AOL (aol.com) — Accurate results
Custom domain business emails (e.g., john@company.com):
Standard mail servers — Highly accurate verification
Catch-all domains — Marked as "Risky" because the server accepts all addresses
Google Workspace — Highly accurate (same infrastructure as Gmail)
Microsoft 365 — Highly accurate (same infrastructure as Outlook)
EmailKit detects and flags disposable/temporary email providers:
Guerrilla Mail, Mailinator, TempMail, and hundreds of others
These are marked as Risky (disposable)
Recommended to remove from your lists as these addresses are temporary
Generic addresses associated with a function rather than a person:
info@, admin@, sales@, support@, contact@, webmaster@
Marked as Risky (role-based)
These often forward to multiple recipients or automated systems
Usually fine for transactional email but risky for marketing campaigns
For every email address, regardless of type:
Check | Description |
|---|---|
Syntax | Is the email formatted correctly? |
Domain | Does the domain exist? |
MX Records | Are mail servers configured? |
Mailbox | Does the specific mailbox exist? |
Disposable | Is it a temporary email service? |
Role-based | Is it a generic/functional address? |
Catch-all | Does the server accept all addresses? |
Some email configurations make full verification difficult:
Catch-all servers — Accept all mail, so we can't confirm individual mailbox existence
Privacy-focused providers — Some providers block SMTP verification entirely
Heavily rate-limited servers — Some servers limit verification connections, leading to "Unknown" results
When verifying in bulk, EmailKit accepts:
CSV files (.csv) — Standard comma-separated values
Excel files (.xlsx) — Microsoft Excel format
Pasted lists — Comma-separated or one-per-line in the dashboard
The system auto-detects which column contains email addresses in CSV/Excel files.
