PLR and Email Deliverability addresses how using unedited PLR email content can negatively impact your sender reputation and cause messages to land in spam rather than the inbox.
Spam filters identify patterns common in mass-distributed material. If many senders use the same PLR email text word-for-word, providers may flag it as bulk mail. The solution is to rewrite subject lines, personalize openings, and vary phrasing throughout. Authenticate your sending domain with SPF, DKIM, and DMARC records for optimal inbox placement.