Hello @OVGC ,   If you narrow-by-tag and explicitly select the "Don't send to contacts who are also tagged with" option, then the Details page of your email will say "Without tag" and then list the tags that were marked for exclusion.    If you select the "Send only to contacts who are also tagged with" option, then the Details page will say "With tag" and the list of tags you marked for inclusion. Another potential way to go about excluding a certain tag would be to do the "Send only to" option and select all the tags except the one(s) you don't want to send to. If your emails' details are all saying "With tag," then it would indicate that you selected the "Send only to" option.    If you believe there's an issue with your email narrow selections, then I'd advise calling our general support so they can continue troubleshooting live. ... View more