Glossary
Disposable email domain
Also called throwaway address, temporary email.
Last reviewed 18 September 2026
What is a disposable email address?
A disposable email domain is one that hands out addresses which expire or forward nowhere after a short period, typed by people who want the thing being offered without the mail that comes with it.
They are not a deliverability disaster in themselves, because a confirmation step removes most of them for free: an address nobody intends to read is an address nobody clicks a link at. What they cost is list size that was never real, and a completion rate calculated against people who were never there.
Blocking them by name is a maintenance job with no end, since the list of such domains changes weekly and every blocklist catches ordinary providers by accident. Confirmation is the cheaper control and it needs no list.
See also
- Confirmed opt-in
Confirmed opt-in, usually called double opt-in, is the practice of sending one message to a newly submitted address and adding it to a list only after somebody clicks the link in that message.
- Role address
A role address is one that belongs to a function rather than to a person, of the info, support or sales kind, and it is read by several people, by nobody, or by a ticket system.
- List hygiene
List hygiene is the work of keeping a list to addresses that exist and belong to people who still want the mail: hard bounces suppressed on the first failure, long-silent addresses retired, typos caught at the form, and nothing re-imported that was already suppressed.
Read next
Every other term is on the glossary index , the longer writing is in the guides, and what this site itself does is on the home page.
Thinking of writing one of these?
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