Subject: Hi Tom, Compliment on One of Your Post
I was checking on some of article on your site and found your post about [ there post name].
[ post link ]
I couldn't help but notice you linked to that classic article about google crawling.
[ competetor link ]
I also love that resource.
In fact it, inspired me to create a more thorough and up to date-to-date version. Here's the link in case you want to check out.
[ ur link ]
It might be worth a mention in your article.
Either way, keep up the awesome work!