Free tool
Free email pattern finder
Which address format a company uses — and the published addresses that prove it.
How this works
A pattern is inferred from addresses the company publishes where the person's name is also known. [email protected] belonging to Jane Doe is one vote for {first}.{last}. Enough agreeing votes and the format is settled.
Confidence comes from agreement and sample size. A local part that matches several templates splits its vote, so an ambiguous sample cannot outweigh an unambiguous one — which is what keeps a single coincidence from being reported as a company-wide rule.
Transliteration is handled in both directions, because "Müller" appears as muller and mueller in real mailboxes and both spellings have to be recognised for the pattern to come out right.
Questions, answered.
What is a company email format?
The template an organisation uses for its addresses: {first}.{last}@company.com, {f}{last}@company.com, and so on. Most companies use exactly one, which is what makes finding an unpublished address possible at all.
How do you work out a company's email format?
By taking the addresses the company publishes where the person's name is also known, and seeing which template explains them. Three addresses that agree is evidence; one is a hint, and reporting a single sample as certainty is how a finder returns the same wrong address for everyone at a company.
What is the most common email format?
{first}.{last} is the most common by a clear margin, followed by {first} alone and then {f}{last}. But "most common" is a prior, not an answer — the point of inferring from a specific domain is that it beats the prior.
Why did you not find a pattern for this domain?
Because the domain publishes no addresses that can be attributed to a named person. Without those there is nothing to infer from, and a confident guess in that situation is worse than saying so.