Email Deliverability
heureka.sk
A
86 / 100
5
MX hosts
10
MX IPs
0
Blacklisted
3
No PTR
3
No FCrDNS
Issues (4)
highMX IP 172.253.139.26 has no PTR (reverse DNS)
highMX IP 2800:3f0:4003:c0f::1a has no PTR (reverse DNS)
highMX IP 172.253.116.26 has no PTR (reverse DNS)
lowDMARC policy is quarantine, not reject