spammers got alias e-mail from my website!

[greenstone]

I'm the webmaster (albeit with little experience) for my husband's website. Today my webmaster@ e-mail is being bombarded with hundreds of mailer daemons about their messages about Viagra and sex with nurses, etc. My husband is a respected photographer, and if any of these get to the wrong people it could be disastrous.

I know the originating IP address of all these. Is there any way to send this idiot an e-mail with a warning, or can I report him/her to the NCC or is there anything at all I can do to stop these?? Any help would be appreciated.