Catch-all report
Is notion.so a catch-all domain?
This report shows the mail configuration for notion.so and runs a live catch-all probe. A catch-all (accept-all) domain accepts mail for every address, which makes verifying individual notion.so mailboxes less certain.
Test a domain for catch-all
This opens one SMTP conversation with the domain's mail server and asks whether a random mailbox is accepted. Many networks block outbound port 25, so a single check can be inconclusive.
Catch-all domains need smarter verification
On a catch-all domain, the server accepts everything, so SMTP alone cannot tell a real mailbox from a typo. Verifly combines multiple signals and flags catch-all addresses so you can decide how to send.
Verify a whole list with 100 free creditsMail configuration for notion.so
No MX records resolved for notion.so at check time. That usually means notion.so does not accept email, or the lookup was momentarily rate-limited.
What catch-all means for notion.so
When a domain is catch-all, its server returns a 250 OK for any recipient — ceo@notion.so, sales@notion.so, or pure gibberish alike. That is convenient for the domain owner (typos still arrive) but it removes the signal a verifier relies on: acceptance no longer proves the mailbox exists.
The right way to treat a catch-all notion.so address is as a middle tier — riskier than a confirmed mailbox, safer than a hard-invalid or disposable one. Verifly returns a dedicated is_catch_all flag so you can decide how aggressively to send instead of guessing.
FAQ — notion.so catch-all & verification
- Is notion.so a catch-all domain?
- A domain is catch-all when its mail server accepts mail for any address, including ones that do not exist. Run the live probe above to test notion.so right now — it opens one SMTP conversation and asks the server whether a random, non-existent mailbox is accepted.
- What are the MX records for notion.so?
- No MX records resolved for notion.so at check time, which usually means the domain does not accept email (or the lookup was rate-limited).
- Why does catch-all matter when verifying notion.so addresses?
- On a catch-all domain an SMTP accept does not prove a specific mailbox exists — the server says yes to everything. So a verifier cannot promote a catch-all address to "valid" on acceptance alone; it should flag it separately, which Verifly does.
- How do I verify notion.so emails in bulk?
- Use the Verifly API: GET https://verifly.email/api/v1/verify?email=name@notion.so with a Bearer key returns a dedicated catch-all flag alongside syntax, MX, disposable and role signals. 100 free credits, no monthly fee.
Verify notion.so emails at scale
The Verifly API returns catch-all, disposable, role and SMTP signals in one call — pay-as-you-go, 100 free credits, no monthly fee.