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Lookups
0
Issues
1
IPv4 address
0
IPv6 addresses
Terms
a:
mx1.tlnt.cz
pass
if the sender's IP address is in the A or AAAA record of this domain.
1 IPv4 address
or else
Included records
v=spf1 a:mx1.tlnt.cz a:mxin1.cbsn.cz