B2B Data Glossary

A curated glossary of B2B data and outbound terminology, written to help revenue teams align on definitions and best practices.

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C

1 term

A domain that appears to accept mail for most addresses, making mailbox validity uncertain.

1 term

A permanent delivery failure, usually because the mailbox does not exist or is rejected.

2 terms

When a provider defers messages because you are sending too fast for their trust level.

A shared inbox like info@ or sales@ that is not tied to a single person.

1 term

A temporary delivery failure caused by throttling, mailbox limits, or short-term server issues.