Disposable Email Blocking in Ultimate Spin Wheel
One of the biggest threats to the value of a captured email list is “dirty data.” Some visitors want the discount without handing over a real address, so they use burner or disposable services (like 10minutemail.com or guerrillamail.com) that self-destruct after a few minutes. You end up storing dead addresses that hard-bounce, and high bounce rates hurt your sender reputation. Disposable Email Blocking is a free, built-in defense that stops those signups before they ever reach your leads table.
How It Works
The plugin ships with a bundled list of known disposable email domains. When the feature is enabled and a visitor submits the spin form, the server checks the email’s domain against that list before recording the lead:
- The check runs on the server: The domain test happens inside the secure spin request (
process_spin), so it cannot be bypassed from the browser. - Exact domain match: The address is lowercased and the part after the
@is compared against the built-in list. For example,[email protected]matches the domainmailinator.com. - The action: If the domain is on the list, the spin is rejected and the visitor sees a block message instead of a result. Realizing they can’t cheat, most people re-enter a real Gmail or Yahoo address because they want the coupon.
Enabling the Feature
- Go to Spin Wheel > Settings and open the Security tab.
- Find the Disposable Email Blocking section and turn the toggle on. The status badge switches to Active.
- Optionally, edit the Block Message field that appears when the feature is enabled. This is the text a blocked visitor sees.
- Save your settings. The block applies to every campaign globally.
If you leave the Block Message empty, the default message is “Please use a valid, non-temporary email address.”
The Built-in Domain List
The list of blocked domains is maintained inside the plugin and covers 100+ known disposable providers such as Mailinator, Guerrilla Mail, and 10MinuteMail. It is refreshed as part of plugin updates, so keeping the plugin up to date keeps the list current.
What the feature does not include: there is no custom blacklist field, no wildcard rules (for example, blocking a whole TLD like .xyz), and no whitelist field. Blocking is based on exact matches against the built-in domain list only. If you need to block specific IP addresses or devices, use the separate Blocked IP Addresses and Blocked Device IDs controls in the same Security tab.
Plus Addressing (the “Gmail Trick”)
Some tech-savvy users submit an alias such as [email protected]. These are still allowed, because the check looks only at the domain (gmail.com), not the alias in front of the @. That is by design: plus-addressed emails are valid and still reach the user’s real inbox, so blocking them would only punish good potential customers.
List Hygiene and ROI
Email list hygiene is about money, not just tidiness. Imagine 10,000 subscribers where 2,000 are disposable. You pay your email service provider to host those 2,000 dead contacts, and every send hard-bounces against them, dragging down your deliverability. Blocking disposable signups at the source keeps your list smaller, cleaner, and more accurate, so your open and click rates reflect real human engagement.
Frequently Asked Questions
How often is the built-in list updated?
The domain list is bundled with the plugin and refreshed through plugin updates. Keeping Ultimate Spin Wheel updated keeps your list current.
Can I add my own domains or whitelist a corporate domain?
No. The feature matches against the built-in list only — there is no custom blacklist or whitelist field. Legitimate corporate and mainstream providers are not on the list, so they are never affected.
Does this block legitimate free providers like Gmail or Yahoo?
No. The list targets known burner services only. Gmail, Yahoo, Hotmail, and Outlook are always allowed.
What message does a blocked visitor see?
By default, “Please use a valid, non-temporary email address.” You can replace this with your own wording in the Block Message field in the Security tab, for example: “Please use a permanent email address to receive your coupon.”
Related Documentation
- IP Blocking & Limits: Block spins by IP address and set entry limits.
- Manual Blocking: Block specific IP addresses and device IDs by hand.
- Security & Fraud Prevention: Overview of the plugin’s anti-abuse protections.
Conclusion
Disposable Email Blocking is a simple, free switch that keeps burner addresses out of your leads table before they can pollute it. Enable it in the Security tab, set a friendly block message, and let the built-in list do the work so every lead you capture is a real opportunity. If you need help, visit the wowDevs support center.