BounceProtect
Clean your email lists before you send
What is Domain Typo Detection?
How we catch gmial.com, yaho.com, and other mistyped email domains.
Domain typo detection identifies email addresses where the domain looks like a mistyped version of a known email provider — for example, gmial.com instead of gmail.com.
How it works
We check every domain against two lists:
- Direct typo map — 30+ confirmed common typos (gmial.com → gmail.com, yaho.com → yahoo.com, hotmai.com → hotmail.com). Detected instantly.
- Distance-based detection — for domains not in the direct map, we calculate the normalised edit distance between the domain and every known provider domain. If the distance is under 25% and the corrected domain is a known provider, we flag it as a possible typo.
What we show
When a typo is detected:
- is_possible_domain_typo: true
- suggested_domain: gmail.com (or whichever correction applies)
- Status: Risky, Send recommendation: Review
Intra-list cross-referencing
When validating a full list, we cross-reference domains against other domains in the same list. If acmecorp.com appears frequently as a valid domain but acmecarp.com appears once, we'll suggest acmecorp.com as the correction — even if it's not a known public provider.
What to do with typo detections
Contact the person and ask them to confirm or correct their email. Do not automatically send to the suggested correction — you don't know for certain which was intended.
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