Have you been getting the "554 5.7.5 permanent error evaluating DMARC policy" while sending emails from your domain? The "5.7.5 permanent error evaluating DMARC policy" is a common error that stops the SMTP ports from accepting emails from your domain.

PowerDMARC partners with Zendata to strengthen email security across Switzerland, Dubai & Bahrain. Combat domain spoofing & phishing attacks.