Morris Minor Owners Club

When getting an email notification of a new post added to a topic, although still getting these notifications, they are now preceded by, in brackets, the words --- SUSPICIOUS MESSAGE and when clicking on the link to take you to the said new post, a traffic like system appears asking if you trust the site associated with the post. If you click the green light = (yes), then you get directed to the topic and can read the new post as normal. Something to do with ---secure web cisco.com. Is this a new thing set up by the administrators of have I done something my end?

It sounds like a spam filter, could be you own software, or something installed by your email provider. You should be able to access the system and "whitelist" or "always trust" (or something similar) mails from the MMOC.