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Lookups
1
Issue
1
IPv4 address
1
IPv6 address
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable.
v=spf1 mx ptr ip4:51.250.125.53 ip6:2a01:4f9:2b:116f::2 mx:mx.yandex.net -all
Copied
Terms
mx
pass
if the sender's IP address is in the A or AAAA record of this domain.
or else
PTR checks should no longer be used. See
RFC 7208, section 5.5
.
or else
ip4:
51.250.125.53 / 32
pass
if the sender's IP is between
51.250.125.53 and 51.250.125.53 (inclusive).
51.250.125.53 and 51.250.125.53 (inclusive).
Yandex.Cloud
AS200350
or else
ip6:
2a01:4f9:2b:116f::2 / 128
pass
if the sender's IP is between
2a01:4f9:2b:116f::2 and 2a01:4f9:2b:116f::2 (inclusive).
2a01:4f9:2b:116f::2 and 2a01:4f9:2b:116f::2 (inclusive).
Hetzner Online
AS24940
or else
or else
-all
fail
the email's SPF check.
Included records
v=spf1 mx ptr ip4:51.250.125.53 ip6:2a01:4f9:2b:116f::2 mx:mx.yandex.net -all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable