wp-includes/PHPMailer/SMTP.php:1120Send an SMTP VRFY command.
$namestringbool public function verify($name) { return $this->sendCommand('VRFY', "VRFY $name", [250, 251]); }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/PHPMailer/SMTP.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.