Why is "Anna Marriage " (anna-marriage.com)
on my Grey List?

Yet another report from a guy that got a letter from this agency saying that he had letters from ladies.

Well, the guy had never registered on the site. This is a bad tactic that I will start listing here EVERY time I hear of it. If the agency is placing profiles of men on their site, what are the odds that they are also doing it for the female profiles they have?

What is more, they guy went and logged in to his account, and was not able to delete the profile.

Sorry, this is a bad sign. 

What can I say? Trust my Spidey-sense.