The spf record for Microsoft has a “ ~ALL “. What does this do and how do we make use of the same for our domain names?
NSLOOKUP Output for Microsoft.com:
> server 4.2.2.1
Default Server: vnsc-pri.sys.gtei.net
Address: 4.2.2.1
> set type=ANY
> microsoft.com
Server: vnsc-pri.sys.gtei.net
Address: 4.2.2.1
Non-authoritative answer:
microsoft.com text =
"v=spf1 mx include:_spf-a.microsoft.com include:_spf-b.microsoft.com inc
lude:_spf-c.microsoft.com include:_spf-ssg-a.microsoft.com ~all"
microsoft.com
primary name server = dns.cp.msft.net
responsible mail addr = msnhst.microsoft.com
serial = 2007053102
refresh = 300 (5 mins)
retry = 600 (10 mins)
expire = 2419200 (28 days)
default TTL = 3600 (1 hour)
microsoft.com MX preference = 10, mail exchanger = maila.microsoft.com
microsoft.com MX preference = 10, mail exchanger = mailb.microsoft.com
microsoft.com MX preference = 10, mail exchanger = mailc.microsoft.com
microsoft.com internet address = 207.46.232.182
microsoft.com internet address = 207.46.197.32
microsoft.com nameserver = ns4.msft.net
microsoft.com nameserver = ns5.msft.net
microsoft.com nameserver = ns1.msft.net
microsoft.com nameserver = ns2.msft.net
microsoft.com nameserver = ns3.msft.net
==
Thanks,