silent email failure
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Silent email failures usually occur because WordPress relies on PHP mail, which many hosts restrict.
WooCommerce assumes mail delivery succeeds unless told otherwise.
Configuring SMTP via a reliable mail service resolves most issues. Logs from SMTP plugins confirm delivery status.Spam filtering and incorrect sender addresses can also block emails.The mistake is assuming “no error” means “email sent.”
The takeaway is to always use authenticated SMTP for transactional emails.