Email Authentication
autoconfig.nethost.cz
SPF
passDeclares which servers may send mail for this domain.
v=spf1 a mx include:spf.nethost.cz -all
DKIM
noneCryptographic signature on outbound mail (selector: none).
No record published.
DMARC
noneTells receivers what to do with mail that fails SPF/DKIM.
No record published.
Mail Servers (MX)
5 server85.viwefix.cz