Contact forms sit on top of WordPress’s email layer. If that layer is misconfigured, forms may show a success message while the underlying email fails.
Because users rarely see an error, businesses often discover the problem only after weeks of missing inquiries.
PHP mail disabled or heavily throttled on the hosting platform.
SMTP plugins using outdated credentials or blocked servers.
From addresses that don’t align with authenticated sending identities.
Missing SPF, DKIM, and DMARC records for the servers that actually send the form emails.
The most reliable fix is to move form emails onto a dedicated, authenticated SMTP route that is actively managed.
GuardianSend configures your WordPress site to use our SMTP providers, updates DNS records for authentication, and tests real form submissions across major inbox providers.
This turns your forms back into a trustworthy lead channel instead of a silent failure point.
If you would rather not debug headers, DNS, and SMTP yourself, GuardianSend can take over website email routing and authentication for you. Visit our Services page or contact us.