Question 1

Does this API perform a live SMTP handshake to verify individual mailboxes?

Accepted Answer

No. The API verifies that the domain is active and capable of receiving mail (via MX record checks, disposable domain detection and typo analysis), but it does not run a live SMTP handshake on the specific mailbox. This keeps responses ultra-fast  and avoids false positives caused by greylisting or catch-all domains, while preventing IP blacklisting from deep verification.

Question 2

How does it reduce bounce rates without an SMTP ping?

Accepted Answer

In real-world applications, mistyped domains and temporary addresses are the leading causes of email bounces. SmartFix Email Edge catches these at the source directly on the edge network:

Syntax & Typo Detection: Identifies RFC format errors and instantly suggests domain corrections (e.g., @gmial.com → @gmail.com).

DNS & MX Verification: Confirms in real time that the destination domain has active, valid mail servers.

Anti-Abuse Filtering: Instantly flags temporary/disposable emails (e.g., Mailinator) and pinpoints generic role-based mailboxes (info@, admin@).

SmartFix Email Edge

Frequently Asked Questions

Does this API perform a live SMTP handshake to verify individual mailboxes?

How does it reduce bounce rates without an SMTP ping?