Email Deliverability
sdu.edu.cn
B
64 / 90
2
MX hosts
5
MX IPs
1
Blacklisted
1
No PTR
1
No FCrDNS
Issues (5)
criticalNo DMARC record
highMX IP 152.32.234.63 is blacklisted
highMX IP 165.154.206.37 is blacklisted
highMX IP 165.154.206.37 has no PTR (reverse DNS)
infoDKIM could not be verified