Sudden deliverability issues Hi everyone,We have used ActiveCampaign for newsletters for many years without major deliverability issues. Since Wednesday, our test emails and campaigns have suddenly stopped reaching inboxes properly.ActiveCampaign shows the emails as sent, but recipients mostly do not receive them or few they land in spam/junk. We have not made any changes to our usual templates, sender domains, content style, or list setup.What we have checked:Our sending domains show as authenticated in ActiveCampaign. Recent campaign performance has been strong. We tested with link tracking disabled, but the issue remained. Personal Gmail did not receive the test. Work Outlook-email did not receive the test. Personal Outlook received it in spam/junk.From the original Outlook message details authentication appears to pass:SPF: pass DKIM: pass DMARC: pass compauth: passHowever, Microsoft classified the message as high-confidence spam:SCL: 9 BCL: 0 Delivery: Junk / spamThe email appears to be sent via ActiveCampaig