[[your name]] here from [[your company]].
I came across [[their URL]] while looking for [[topic]].
It's really helpful, thank you so much.
Though -- can I make a quick suggestion? I have a few resources here that might be good addition to your page.
Quick fact: They were added on [[page it was added]] too.
Would you be interested if I sent them over?
“ It's genuine, direct, and simple. I didn't have to make any background story on why I'm emailing. I simply tell my contacts that I have a great content which could be a good addition to their resource, that's all. It may seem simple, but that's what it is, and I think that is why the template I used had great success.