I've got a customer receiving emails from ProofPoint and failing SPF. Looks like they followed this page on ProofPoint's website:
https://support.proofpointessentials.com/index.php?/Knowledgebase/Article/Vi ew/346/0/why-is-spf-check-failing-with-office-365 Basically, add "a:dispatch-us.ppe-hosted.com" to your current SPF record. $ dig +short dispatch-us.ppe-hosted.com 148.163.129.52 148.163.129.53 67.231.154.189 67.231.154.184 148.163.129.62 67.231.154.188 67.231.154.187 67.231.154.164 148.163.129.49 67.231.154.183 67.231.154.186 148.163.129.58 148.163.129.56 67.231.154.165 148.163.129.63 148.163.129.48 Is this a legit method? Looks like it's a typical round-robin so will fail more often then work.. Sincerely, Eric Tykwinski TrueNet, Inc. P: 610-429-8300
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