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Learn the best practices for email verification, including when to verify email addresses, maintaining clean mailing lists, and improving email deliverability.
Email verification is most effective when it becomes a regular part of your data management process rather than a one-time task. Following best practices helps maintain accurate mailing lists, reduce bounce rates, improve sender reputation, and maximise the effectiveness of your email campaigns.
Whether you collect email addresses through websites, forms, CRM systems, or manual imports, verifying them before use helps ensure better communication with your audience.
The best time to verify an email address is when it is first collected. Early verification helps prevent invalid or temporary email addresses from entering your database.
Common verification points include:
Even previously verified email addresses can become inactive over time. Before sending a marketing campaign, verify your mailing list to identify addresses that may no longer be suitable.
Regular verification helps:
| Verification Result | Recommended Action |
|---|---|
| OK | Use for email campaigns. |
| Catch All | Review carefully before sending. |
| Disposable | Exclude from long-term mailing lists. |
| Invalid | Remove from your database. |
| Unknown | Review or re-verify later if appropriate. |
Keeping your mailing list clean improves long-term email performance.
Always verify email lists before importing them into your marketing platform or CRM, especially if they were collected from external sources or have not been used recently.
This helps prevent outdated or invalid contacts from affecting future campaigns.
Review completed verification reports from Dashboard → Verification → Completed after every verification job.
The reports provide useful information including:
If you use the Email Verification API, keep your API credentials secure.
| Step | Recommendation |
|---|---|
| 1 | Collect email addresses. |
| 2 | Verify new email addresses immediately. |
| 3 | Remove Invalid and Disposable email addresses. |
| 4 | Review Catch-All and Unknown results. |
| 5 | Use verified contacts for campaigns. |
| 6 | Periodically re-verify older mailing lists. |
Verify new contacts when they are collected and re-verify existing mailing lists before major email campaigns or after long periods of inactivity.
Catch-All email addresses are not necessarily invalid, but they should be reviewed carefully before use because mailbox existence cannot always be confirmed.
Disposable email addresses are generally unsuitable for long-term communication and should usually be removed from marketing lists.
People change jobs, close accounts, or abandon old email addresses. Regular verification helps identify these changes before they affect campaign performance.
No. Email databases change over time, so periodic verification is recommended.
Before importing them into your CRM or email marketing platform.
Yes. Cleaner mailing lists typically result in lower bounce rates and better overall campaign performance.
Yes. Downloading and retaining verification reports can help you review list quality and maintain records of previous verification jobs.
Our support team is always happy to assist you.
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