34 votesDan supported this idea ·Dan shared this idea ·
112 votes10 comments · Office 365 Security & Compliance » Spam & Phishing · Flag idea as inappropriate… · Admin →
When you have another service scanning in front of Office 365, the proper thing to do is disable the Office 365 scanning altogether and (optionally) respect the verdict from the prior system. Once you do that, even with the SPF header, the mails will not go to the users’ junk folders.Dan commented
^This! We also use Mimecast to act as our inbound and outbound mail gateway between our on-prem mail servers and Office 365 tenant. OP's post is dead on - I'd REALLY like to be able to disable SPF checking.