To resolve Gmail blocking emails from a WooCommerce WordPress site, experts, marketers, and documentation sources offer consistent advice. Key issues include sender IP problems, authentication failures (SPF, DKIM, DMARC), spam issues from forms, and mail generation software reputation. Solutions involve using a consistent IP address, authenticating emails, employing a dedicated SMTP service or plugin, maintaining a clean email list, ensuring the 'From' address matches the domain, configuring the Return-Path, monitoring domain reputation via Google Postmaster Tools, and checking email spam scores. Good list hygiene, segmentation, personalized content, and proactive bounce management are also essential.