3 / 10
Lookups
1
Issue
3
IPv4 addresses
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:
.
PTR checks should no longer be used. See
RFC 7208, section 5.5
.
or else
ip4:
178.157.7.119 / 32
pass
if the sender's IP is between
178.157.7.119 and 178.157.7.119 (inclusive).
178.157.7.119 and 178.157.7.119 (inclusive).
Mass Response Service
AS51265
or else
a:
steelhost.de
pass
if the sender's IP address is in the A or AAAA record of this domain.
1 IPv4 address
or else
~all
soft fail
the email's SPF check.
Included records
v=spf1 mx ptr ip4:178.157.7.119 a:steelhost.de ~all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable