Glossary / BYTECHECK
Email verification glossary
Short, plain-English definitions.
- Catch-all email
- A domain that accepts mail for any address, so a specific mailbox can't be confirmed.
- Hard bounce
- A permanent delivery failure, usually because the address doesn't exist.
- Soft bounce
- A temporary delivery failure such as a full mailbox or server outage.
- SMTP verification
- Checking a mailbox exists by talking to the receiving mail server without sending a message.
- MX record
- A DNS record that says which servers receive email for a domain.
- Disposable email
- A temporary inbox that expires shortly after creation.
- Role-based email
- An address for a function, like info@ or sales@, rather than a person.
- Email deliverability
- The ability of your emails to reach the inbox rather than spam or bouncing.
- Spam trap
- An address used by mailbox providers to catch senders with poor list hygiene.
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