Hacker News new | past | comments | ask | show | jobs | submit login

I doubt it. Some servers may reject based on SPF when there is no DMARC policy but there is no way to know that DKIM is enabled unless you see a signature. So a spoofer could just not include a signature and the receiver would have no way of knowing if the message should be signed.



Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: