Mails send from Sophos central (do-not-reply@cloud.sophos.com) are being rejected by Sophos Anti-spam SPF checks due to a missing SPF record, mail is send from 52.58.166.242 , currently the cloud.sophos.com SPF record does not include this IP:
spf:cloud.sophos.com
v=spf1 ip4:208.70.208.0/22 -all
Sophos Puremessage and Sophos UTM email protection bounce these e-mails...
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