3 / 10
Lookups
1
Issue
1
IPv4 address
0
IPv6 addresses
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable.
Terms
mx
pass
if the sender's IP address is in the A or AAAA record of this domain.
1 IPv4 address
or else
PTR checks should no longer be used. See
RFC 7208, section 5.5
.
or else
or else
-all
fail
the email's SPF check.
Included records
v=spf1 mx ptr mx:mx.cittel.ru -all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable