alas.matf.bg.ac.rs. 30 IN TXT "v=spf1 ip4:147.91.64.2 ~all" alas.matf.bg.ac.rs. 30 IN A 147.91.64.2 Mail exchangers: alas.matf.bg.ac.rs. 30 IN MX 10 leukocit.matf.bg.ac.rs.