Office 365 spf hard fail To accomplish this in the Exchange Online admin center, go to protection > spam filter > advanced options, turn the switch SPF record: hard fail to On, then click Save. Some months back, I tried implementing some basic anti-spam settings at my company which is a small startup. Solution – Disable SPF check on Office 365 or Add SPF record as recommended by Microsoft. Feb 20, 2024 · Because EOP uses IP address 2 instead of IP address 1, any domain that publishes an SPF hard fail will fail SPF and will be marked incorrectly as spam. Situation – Emails being delivered to Office 365 are getting rejected due to SPF check. Sep 1, 2025 · In Exchange Online, SPF fail handling is configured using Exchange Online Protection policies and mail flow rules that determine how fail results are handled—either by rejecting, quarantining, or tagging messages for further spam filtering. This setting is now depreciated and it can cause your SPAM policies to quarantine/junk/deliver items that should be handled by the phishing policies. Jun 19, 2025 · Learn how to set up an SPF record for Office 365 to improve email deliverability, prevent spoofing, and keep your cold emails out of the spam folder—step-by-step instructions included for major domain providers. With guide on how to create a custom SPF record for all your mail systems Apr 30, 2023 · Creating an SPF rule that flags messages from outside the company pretending to be inside the company alerts users. Select Off for the SPF Record: Hard Fail and Sender ID filtering hard fail options and click Save. elppo qvue q0zt3 iyem zc72l cge xqp 9opq 6vjrdsx m0e2oj