Jim Cummings no longer has an official website or fan email address. The only way to contact him directly is via the postal mail addresses below or through his Twitter @Jimcummingsacme (https://twitter.com/Jimcummingsacme). He is only sporadically active on Twitter so he doesn't answer every message but he does man that account himself so it’s the only way to talk to him directly.
I know everyone is anti-snail mail these days but, if you want to get a message to him, it may be the best way! He's pretty good about answering fan mail, albeit slowly.
Contact | The Cult of Cummings: for fans of voice over actor Jim Cummings
Can I just copy and paste your entire website and pretend I made it? Absolutely not. Don’t incur my wrath. In all seriousness, this has happened before and nearly made me shut the site down a few times it upset me so much.