As the others have said. Seems to predominantly be a gmail issue. Switched my email account for here to my hotmail/outlook live one and first message went to spam, selected the message as not spam and now all messages seem to be coming through fine.
The issue seems to affect Gmail users only, I guess boon's explanation above is spot on what happening.
@Joker I do a get an email, in my spam folder though. My mail client on laptop/nor my phone mail app do not get it untill I physically mark it as "not spam" in Gmail. Kind of like getting a cold cup of coffee in a cafe. You still get it, but it's cold (and you didn't ask for a iced coffee).
@Andy_Mac will pm you now.