DNS

DNS troubleshooting

• http://www.dnsinspect.com/  ****  great info to get
• http://www.intodns.com/  check your DNS settings
• http://viewdns.info/
• http://www.dnsqueries.com/en/
• https://check-host.net/      check your host from various countries
• https://www.ipvoid.com/   IP Address Tools Online

SPF check

• http://www.kitterman.com/spf/validate.html
• remove from Hotmail blacklist

Free Public DNS servers

• http://theos.in/windows-xp/free-fast-public-dns-server-list/

Setup Secure DNS

• https://1.1.1.1/help