I am inquiring about how to setup a proper SPF record. I know there are SPF wizards/generators available but each seem to have a different "opinion" of what should be included and what should not be included. Let me give you a scenario of my setup, and hopefully someone can help me out. My domain is: test.com My mailserver hostname is: mail.host.com which also has a MATCHING PTR record mail.host.com (for example) resolves to 18.104.22.168 and 22.214.171.124 resolves to mail.host.com This is a STANDALONE mail server which will receive and send email without any VIP's or load balancing. There is however one additional host that will send out mail from the domain but it wont be receiving mail, it will only be used as an SMTP (outbound only) server attached to a website automailer which is on a seperate webserver... It only generates error reports and sends them out... so technically it isn't a full mail server but it will be sending (outbound only) mail on behalf of the domain. The additional host is: mail2.test.com which resolves to 126.96.36.199 and there is a Matching PTR. These are the ONLY mail servers and IP addresses that will be sending out mail from the test.com domain. Some websites say I should use -all and others say -all will cause some MTA's to reject and ~all is better to use even if those are the only two hosts sending out mail. Would you be able to assist with a solid SPF record?