Domains with DNS TXT v=spf1 a mx ip4:51.91.186.58 include:spf.npnservers.net ip6:2001:41d0:203:585f:800:0:0:ba3a -all
There is 1 domain that have DNS TXT set to v=spf1 a mx ip4:51.91.186.58 include:spf.npnservers.net ip6:2001:41d0:203:585f:800:0:0:ba3a -all.