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never-guess-an-email

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Use this skill when you have a target company but no verified contact address and you are tempted to infer one from a pattern — first.last@, f.last@, firstinitiallast@. Produces a routing decision per account: send, route to another channel, or leave unreachable and say so. Covers pattern-guessing, role inbox selection, dead-domain checks, and what to do when no address exists at all.

skills/lucas-godtfredsen/never-guess-an-email/SKILL.md

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Observed behavior
Instructions only
Last checked
Nov 11, 2026

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237
Repository last updated
Oct 20, 2026
License
MIT

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A guessed address is a bounce you paid for with your sender reputation. This
decides, per account, whether an address may be sent to at all.

## The play

1. **Take only what was published.** An address found on their site, in a
   registry, on a verified data source, or given by a person is a contact. An
   address you assembled from a name and a domain is a hypothesis.
2. **Check the domain can receive mail before you queue anything.** A lookup
   for mail records — falling back to the address record — costs nothing and
   catches the dead domain that a scraper happily handed you. A lookup that
   fails to answer is not a dead domain: retry later, never suppress on a
   timeout.
3. **Rank the role inboxes you did find.** Sales-flavoured first
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