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Lookups
1
Issue
514
IPv4 addresses
1
IPv6 address
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable.
Terms
ip4:
212.4.65.0 / 24
pass
if the sender's IP is between
212.4.65.0 and 212.4.65.255 (inclusive).
212.4.65.0 and 212.4.65.255 (inclusive).
WWZ Telekom AG (TELEZUG)
AS8821
or else
ip4:
212.4.64.0 / 24
pass
if the sender's IP is between
212.4.64.0 and 212.4.64.255 (inclusive).
212.4.64.0 and 212.4.64.255 (inclusive).
WWZ Telekom AG (TELEZUG)
AS8821
or else
mx
pass
if the sender's IP address is in the A or AAAA record of this domain.
2 IPv4 addresses
1 IPv6 address
or else
PTR checks should no longer be used. See
RFC 7208, section 5.5
.
or else
-all
fail
the email's SPF check.
Included records
v=spf1 ip4:212.4.65.0/24 ip4:212.4.64.0/24 mx ptr -all
The 'ptr' mechanism shouldn't be used because it's slow, resource intensive, and not very reliable