On 8/13/2013 12:16 PM, Charles Marcus wrote: > Hi everyone, > > This question is about what are best practices with respect to DNS - > including reverse DNS - when my mail server is hosted locally, and > we use an outsourced anti-spam service for inbound filtering, as > well as relaying all outbound mail through them. > > I have had a recent complaint from someone who claims that their > Outlook is classifying all of our emails with big scary warnings > that they are 'phishing attempts'. > > Does anyone see any problem with this email, as far as DNS/reverse > DNS goes? >
All the DNS hostnames/IPs appear to match. I see nothing whatsoever to complain about. You don't appear to have SPF nor DKIM configured. While in no way required, those do give some assurance that the mail is not forged, and may help. Or may not help, since you don't really know why outlook is complaining. Maybe offending messages have HTML content that outlook is confused about? -- Noel Jones
