Doesn't matter where in the zone file it's located. It just goes in as a text record in the mail server's zone file, the order's not important.In other words do i just put the above SPF on a line below the DNS servers in the conf file?
My thoughts and experience with Hotmail...
1/ Hotmail tracks the Message ID and that is the primary means of determining real from spam mail... eg. A new mail from xyz to hotmail will almost never deliver. But a new mail sent from hotmail, out to xyz and replied to by xyz, will always deliver to hotmail. All "replied too" mails that were genuine hotmail originals, will deliver into hotmail.
Hence a hotmail user can always expect an answer to his own original mails, but he will never know what mail hotmail has blackholed for him. i.e. Hotmail is a one way mail service.
2/ Hotmail tracks the IP's of MTA's that send mail regular (the ISP), and gives them a better chance of delivering. Mail from very low volume MTA's has an impossible task of getting delivered, and is droped almost always (because it looks like a spam bot).
3/ SPF is ignored - it has no effect on Hotmail.
4. Authenticate your outbound e-mail: Publish Sender Policy Framework (SPF) records
Windows Live Hotmail currently uses Sender ID to provide additional input to the SmartScreenTM junk e-mail filter process which helps determine if the e-mail or sender is legitimate. The Sender ID Framework is an authentication technology and the key piece of the framework is checking SPF records.
If you mean the SNDS https://postmaster.live.com/snds/index.aspxHave you filled put and applied for the services on th hotmail postmaster page? Once you have their version of feedback loop and the email monitoring you will know better what is happening.
whenever my clients try to send email from the server. I addition clients attempting to send to the server from hotmail also get a similar message. When I disable the callout verification checks everything works fine again, but of course it means the server has to process much more spam since it's not being discarded by the callout verification.550 Your e-mail was rejected for policy reasons on this gateway. Reasons for rejection may be related to content with spam-like characteristics or IP/domain reputation problems.
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