Validate emails in array using foreach

Are you aware you can pass a comma-separated string of email adresses to wp_mail?

// Make sure your email strings only uses comma as a separator
$emails = preg_replace('~[,;\s]+~', ',', $emails);

Then just throw that string into wp_mail’s first argument. Depending on exactly what you want to do with the emails, this approach may be sufficient.

The wp_mail function internally relies on the PHPMailer library (unless you use a redefined wp_mail function). PHPMailer validates the email before adding it to the recipient list. Invalid emails will be skipped.