1 / 10
Lookups
0
Issues
3
IPv4 addresses
0
IPv6 addresses
Terms
mx
pass
if the sender's IP address is in the A or AAAA record of this domain.
1 IPv4 address
or else
ip4:
158.75.1.4 / 32
pass
if the sender's IP is between
158.75.1.4 and 158.75.1.4 (inclusive).
158.75.1.4 and 158.75.1.4 (inclusive).
Nicolaus Copernicus University in Torun
AS12423
or else
ip4:
158.75.1.10 / 32
pass
if the sender's IP is between
158.75.1.10 and 158.75.1.10 (inclusive).
158.75.1.10 and 158.75.1.10 (inclusive).
Nicolaus Copernicus University in Torun
AS12423
or else
-all
fail
the email's SPF check.
Included records
v=spf1 mx ip4:158.75.1.4 ip4:158.75.1.10 -all