I have been getting reports from clients that notifications are not coming through. I have noticed the following factors: non-SMTP sites, 2.7.x, Honeypot set to not create entries if marked as spam, messages from emails that used to be perfectly fine are now being marked as spam.
Historically I would setup a site and input a dummy From address (ie. firstname.lastname@example.org) and it would work flawlessly. Obviously having SMTP is better and I push people to setup a Gmail for that express purpose.
However, I am wondering if there is something in 2.7.x that causes this anomaly.