I send email from my server while having the “from” and “reply-to” fielding being from hotmail and gmail. This results in some of m emails being blocked or spam boxed. Is it possible to add two SPF entries or can I combine into one?
3600 is the TTL, or Time To Live – the amount of time DNS resolvers are allowed to cache the result. In this case one hour (60 minutes * 60 seconds = 3600 seconds)
Well, your server are not very known as hotmail, gmail, etc… so you get only neutral rank. neutral rank is very fine. But the problem is not in spf = you are forging emails (your email must come from your server and your domain), or come from gmail and etc it selves (from webmail or smtp). You may always set reply-to as gmail account or anything, but field from need to be your email account at your server. Otherwise some servers may check it up and your mail will go to spam folder.