Email Authentication

fio.cz

SPF

pass

Declares which servers may send mail for this domain.

v=spf1 include:_spf.fio.cz -all

none

Cryptographic signature on outbound mail (selector: none).

No record published.

pass

Tells receivers what to do with mail that fails SPF/DKIM. Policy: reject.

v=DMARC1; p=reject; sp=none; rua=mailto:dmarc@fio.cz; ruf=mailto:dmarc@fio.cz

10 smtp1.fio.cz

10 mx1.fio.cz

30 smtp2.fio.cz