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IPv4 addresses
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IPv6 addresses
Terms
ip4:
77.55.148.253 / 32
pass
if the sender's IP is between
77.55.148.253 and 77.55.148.253 (inclusive).
77.55.148.253 and 77.55.148.253 (inclusive).
Nazwa.pl Sp.z.o.o.
AS15967
or else
mx
pass
if the sender's IP address is in the A or AAAA record of this domain.
1 IPv4 address
or else
-all
fail
the email's SPF check.
Included records
v=spf1 ip4:77.55.148.253 mx -all