Hmm. On a hunch, try filtering for messages which contain ".link>" in the headers. (That is, add a greater-than sign to the end of what you're currently searching for.)
I suspect the sender for these messages will appear in the message headers in standard email format, e.g.
From: "A Dirty Spammer" <email@example.com>
So you can effectively use that greater-than sign to limit the match to showing up at the end of an email address.