Direct answer
Use a verifier or disposable-domain list, flag identified temporary services and review them before exclusion. Temporary addresses can receive email today but may stop working later.
More questions and answers
Are 10-minute email addresses real emails?
They can be real, temporarily deliverable mailboxes, but are not reliable long-term subscriber contacts. Classify them separately from malformed or nonexistent addresses.
Should I block Mailinator addresses from marketing emails?
For an ongoing opted-in newsletter, a known disposable-domain policy may be reasonable. Distinguish one-time test signups from legitimate users and apply rules consistently.
How do I clean a list containing fake signup emails?
Remove obvious invalid and disposable entries, verify remaining addresses and consider confirmed opt-in for future signups. Verification cannot by itself prove a person consented.
Can temporary email addresses pass verification?
Yes. A temporary inbox can respond as deliverable during its short lifetime. You need a separate disposable-domain flag as well as mailbox checks.
How can I stop disposable email registrations?
Apply disposable-domain detection at signup, offer a fair fallback for false positives and confirm ownership when necessary. Recheck the list periodically because new domains appear.