Fake and mistyped email addresses cost you money: invoices nobody reads, renewals nobody receives, fraud orders with a throwaway address. MailGuard makes WHMCS prove an email address belongs to the person using it.

A new client cannot finish checkout until they click the link in their inbox, and an existing client with an unverified address is stopped at login, at renewal or when opening a guest ticket, whichever of those you switch on.

What it does

• Blocks checkout until a new client confirms their address.
• Stops unverified existing clients at login, with a resend link.
• Refuses renewals and orders on an address nobody has confirmed.
• Verifies guest tickets opened without an account.
• Each control on its own switch, effective the moment you save.
• Three email designs for the verification message, in English and Spanish.
• Rate limits on resends, so nobody can use your form to flood an inbox.

For your team

• A dashboard with verified, unverified and pending clients and the verification rate.
• A client list with each client's status, plus one-click manual verify or resend.
• A full log of every sent, verified, resent and blocked event.

Your mail, your data

It sends through your own WHMCS mail configuration. No third-party service, no per-email cost, no address of ours in the headers. Addresses and logs never leave your database. It works with any WHMCS template, with nothing to edit in your theme.

Never closes your shop

If the licence cannot be validated, the module stands down instead of standing in the way: verification stops being enforced and your clients keep signing in and ordering normally.

Tested, not assumed

Every release is installed on real WHMCS installations (8.13.7 LTS, 9.0.0 and 9.0.8) and checked as a buyer receives it.

Licence and pricing

$39 one-time, one installation. The first year of updates and support is included. A full installation and user manual comes with the module.