Hey, I run Mautic v3.31, and I tried sending out some abandoned cart emails, to myself (an outlook.com account), and immediately received the “DO NOT CONTACT” flag, as if I unsubscribed, but obviously, I didn’t do so.
I’m beginning to suspect it is an Outlook.com thing? Is there some way I can check and verify this?
I use Send In Blue as a SMTP relay, so it should be pretty reputable. SPF/DKIM, DMARC all set up properly too.
EDIT: The same also goes with gmail.com. And there is no way to remove this flag from Mautic’s site, unless I delete the contact and re-add it. And then it somehow does not trigger this the second time, sometimes.