www.trustedsource.org – reputation and volume
www.senderbase.org – reputation and volume
SENDING TO HOTMAIL
EXCELLENT testing resource
SE sample SPF record: v=spf1 ip4:18.104.22.168 ip4:22.214.171.124 ip4:126.96.36.199 ip4:188.8.131.52/24 ~allthe first ip4 address is exchange serverthe second ip4 address is bomgarthe third ip4 address is kayakothe fourth range is blackberry / RIM ==> all of those servers are marked as allowed to send outbound on behalf of SE
Add an SPF record to DNS and then email firstname.lastname@example.org telling them that it’s done, including the IP address and hostname in the message. It will take some back and forth, but you should then be able to send to Hotmail users again – this process may take as long as a week.