spf

Description: Configure your DNS server to include SPF records for your domain. The only acceptable as a source of e-mail from your domain is your server. The SPF record should reflect this. Implementation: Add line to /etc/bind/db.d4.sysinst.ida.liu.se: @ IN TXT "v=spf1 mx -all" Restart service: service bind9 reload Verification: dig d4.sysinst.ida.liu.se TXT should return the above line Sending an email from server.d4.sysinst.ida.liu.se to e.g. a gmail should have a ‘Received-SPF: pass’ in the header....