I created an email (either outlook or gmail) and sent some people emails. Later, when I tried to log into my email, I was given a notification that my account has been marked as a spam account. Does this mean that my emails were sent to the spam folder. How can I guarantee that an outlook or gmail account is delivered to its intended recipient without being in the spam folder? And is there a way of knowing afterwards whether an email was delivered to the inbox and not the spam folder?
Also, I'm sending legitimate emails. I'm not mass emailing anyone, I probably emailed five people and the content of the email included one link and several attachments. Is this why, and if it is, how can I overcome this?