Email security & deliverability · grade A
v=spf1 ip4:155.158.102.210 ip4:155.158.102.75 ip4:155.158.102.69 ip4:155.158.102.209 ip4:155.158.102.247 ip4:155.158.102.69 ip4:155.158.104.167 ip4:155.158.102.57 ip4:208.91.114.151 include:_spf.google.com a:mailbus.bg.us.edu.pl a:theta2.us.edu.pl -all