Email Deliverability
21cn.com
D
42 / 90
1
MX hosts
1
MX IPs
1
Blacklisted
1
No PTR
1
No FCrDNS
Issues (5)
criticalNo DMARC record
highMX IP 14.18.69.193 is blacklisted
highMX IP 14.18.69.193 has no PTR (reverse DNS)
lowOnly one MX host
infoDKIM could not be verified