Domains with DNS TXT v=spf1 a mx include:_spf.syphon.sk include:_emailing.heureka.cz ip4:212.57.35.157 ip4:212.57.36.146 -all
There is 1 domain that have DNS TXT set to v=spf1 a mx include:_spf.syphon.sk include:_emailing.heureka.cz ip4:212.57.35.157 ip4:212.57.36.146 -all.