Email Deliverability
zhihu.com
B
82 / 100
2
MX hosts
4
MX IPs
0
Blacklisted
4
No PTR
4
No FCrDNS
Issues (5)
highMX IP 103.86.78.2 has no PTR (reverse DNS)
highMX IP 103.86.78.3 has no PTR (reverse DNS)
highMX IP 43.154.252.16 has no PTR (reverse DNS)
highMX IP 43.154.252.202 has no PTR (reverse DNS)
lowDMARC policy is quarantine, not reject