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Deliverability

Disposable email address

A disposable address is a temporary mailbox from a service like Mailinator or 10minutemail, used to get past a sign-up form. It usually stops existing within hours.

On a B2B prospecting list these are rare, because you are collecting addresses businesses published rather than addresses people typed into a form. They show up in volume on inbound lists, free trial sign-ups and anything gated behind a download.

Filtering them is a domain-list problem rather than a clever one. The list of disposable domains changes constantly, so the check is only as good as how recently it was updated, and a stale list is close to useless.

Related terms

Email verification
Email verification is checking whether an address can actually receive mail before you send to it. A full check tests the syntax, then the domain's mail records, then asks the receiving server about the specific mailbox.
List hygiene
List hygiene is the habit of removing addresses that bounce, never engage, or should never have been added, so your sending reputation is not spent on people who are not there.
Role-based email address
A role-based address belongs to a function rather than a person — info@, sales@, contact@, hello@. It is usually a shared inbox, and for local business outreach it is often the only address published.