Email Authentication
arkusze.pl
SPF
passDeclares which servers may send mail for this domain.
v=spf1 include:_mail.dhosting.pl -all
DKIM
failCryptographic signature on outbound mail (selector: default).
v=spf1 include:_mail.dhosting.pl -all
DMARC
noneTells receivers what to do with mail that fails SPF/DKIM.
No record published.