The automated Xibo Community summary emails (and likely others) are landing in my junk folder, and that’s probably the case for subscribers to O365 and other major providers because the sender domain can’t be validated against either MX or SPF:
Authentication-Results: spf=none (sender IP is 22.214.171.124) smtp.mailfrom=xibo.org.uk; <redacted_domain>.com; dkim=none (message not signed) header.d=none;<redacted_domain>.com; dmarc=none action=none header.from=xibo.org.uk;compauth=fail reason=001 Received-SPF: None (protection.outlook.com: xibo.org.uk does not designate permitted sender hosts)
Your MX records for xibo.org.uk refer to Google’s mail servers, but it looks like these are being sent from your own infrastructure. You might want to set up an SPF record for xibo.org.uk like you have for springsignage.com:
springsignage.com. 10089 IN TXT "v=spf1 mx ip4:126.96.36.199/32 include:spf.mailjet.com include:_spf.google.com include:_spf.elasticemail.com ~all"