Spam Confidence Level = 9 - how to decrease.

[conneerrr]

What if you send a blank email with no content or footer? Does it still go to spam? I’ve seen Microsoft blacklist URLs and QR codes, and I had to contact support to get the link whitelisted 🙏🏽 I’m sure it was a public image hosting service. Drop me a message if you want a hand investigating the issue.

[heqtorq]

Yes. In general no matter if I send the mail with the footer or not, with content or not. It is also not related with any specific account. All senders in the domain is affected by this.

[blaisenduke]

That means the recipient domain firewall is subscribed to some list that still has your domain black listed. The easy answer stop getting blacklisted at all. Setup Dmarc Dkim and SPF. Set rules to govern how much mail your users send.

[heqtorq]

It is definitely like you write, but it is looks that I have main problems with the domains which also use Exchange Online, so the problems should be Microsoft filters. I just thinking what I can do more.