Contact Gmail re: spam addressed from my account

I'm getting gmail spam purportedly from my own email address. My passphrase length borders on absurdly long, so I doubt they hacked my account. It looks like a mailserver (telus.com) that Google trusts got 0wned and is relaying. How do I report it to gmail SRE's? In this case, I don't want to click the "This is spam button".