آیا dns اختصاصی کافیه؟

[nightman]

من که کاملا گیج شدم

از Cloudflare استفاده کنید و حتما برای ارسال میل از سرور جدا استفاده کنید

Run email on separate server/service

If you are running your mail on the same server as your website, then the attacker can always find your origin server IP. To close this possible security gap, you can use an email service on a separate server than your website, whether through your hosting provider or an outside service