/ Marketing

The Email Permutator

Most companies are predictable. Use algorithms to guess the right inbox.

An email permutator turns a person's first name, last name, and company domain into every common corporate address format, so you can find the one that reaches them. For John Smith at acme.com it builds john@acme.com, john.smith@acme.com, jsmith@acme.com and 31 more, then shows the five patterns that cover most of the Fortune 500 first.

How the patterns are built

Four plain steps, run for every format:

  • Clean each input: lowercase the names, strip accents and punctuation, and drop the protocol and www. from the domain.
  • Take the first initial of each name.
  • Join first, last, and the initials with the separators companies actually use: nothing, a dot, an underscore, or a hyphen.
  • Order them so the Big 5 (first@, first.last@, flast@, firstlast@, first_last@) sit at the top.

Reference: John Smith at acme.com

Pattern Generated address
first@domain john@acme.com
first.last@domain john.smith@acme.com
flast@domain jsmith@acme.com
firstlast@domain johnsmith@acme.com
first_last@domain john_smith@acme.com
last.first@domain smith.john@acme.com
lastfirst@domain smithjohn@acme.com
last_first@domain smith_john@acme.com

How it works

Enter the prospect's first name and last name.

Enter the company domain (e.g., google.com).

The tool generates 34 common email formats.

The "Big 5" (used by 90% of Fortune 500) are shown first.

Click "Copy All for Gmail" to test via profile picture verification.

Why it matters

Cold outreach is a game of millimeters. If you don't have the right email, you don't have a lead. This tool generates the 34 most common corporate email structures. It categorizes the 'Big 5' (used by 90% of the Fortune 500) so you can prioritize your testing. Use the Gmail Copy feature to paste them all into a draft and see which one loads a profile picture.

The Gmail Hack

Paste all emails into Gmail's "To" field. Gmail will render them as chips. The correct email will often show a profile picture, revealing which format is valid.

Questions people ask

What is an email permutator?

An email permutator takes a person's first name, last name, and company domain and lists every common way their work address could be spelled: first@, first.last@, flast@, and so on. Instead of guessing a single format, you get all 34 candidates at once and test them.

How do I find which permutation is the real address?

Paste the full list into Gmail's To field. Gmail renders each address as a chip, and a valid mailbox often shows the person's profile photo, which reveals the correct format. You can also run the list through an email verification service, or check the Big 5 patterns first since they cover most companies.

What is the most common corporate email format?

first.last@company.com is the single most common pattern, followed by first@, flast@ (first initial plus last name), and firstlast@. These five formats, the Big 5, account for most Fortune 500 addresses, so test them before the longer, rarer permutations.