Guide
Disposable email addresses: risks and cleanup.
Disposable addresses look valid today and vanish tomorrow. Here's how to find them and keep them out.
No monthly subscription · Credits never expire · Unknown results use no credits
Why people use them
To get a download, a coupon, or a trial without sharing a real address. That's understandable, but these contacts rarely become customers.
The risks for your list
- Inflated subscriber counts
- Bounces once the temporary inbox expires
- Skewed engagement metrics
- Possible abuse of free trials
Keeping them out
- Verify new sign-ups in batches
- Use double opt-in
- Review flagged addresses before adding them to campaigns
What MailGuard can help with
- Checking single addresses or bulk CSV/TXT lists before a campaign
- Sorting each address into Passed, Failed, or Unknown, with a plain-language reason
- Flagging disposable domains, role accounts, syntax issues, and catch-all behavior
- Exporting a filtered list that contains only the results you choose
- Paying only for Passed and Failed results, since Unknown results use no credits
Limitations
Verification reduces uncertainty before sending. It does not guarantee inbox placement and does not replace consent or list hygiene.
Frequently asked questions
Are disposable emails marked Failed?
Not always. They may pass mailbox checks while active, so MailGuard flags them in the details for you to review.
Related
Ready to check your list?
Pay only for Passed and Failed results. Credits never expire.
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