[PortableCode]

I usually subscribe postmaster@(domain) to the newsletter as RFC822 requires the account to be active ;)

[codazoda]

I doubt it's actually active on most domains even though the RFC asks for it to be so. I would even guess that admin@(domain) might be more effective. Just a guess on my part though.

[korethr]

My initial thought is that signing up abuse@(domain) would be a clever irony. My next thought is that abusing the abuse inbox is probably a dick move to the sysadmin who's job it is to keep things working.