autoresponders

Perhaps I should direct this inquiry elsewhere, but I'm new to this list, and I don't understand why every time I reply to someone's message I get no less than 7 autoresponse messages from spam filters/servers stating that their address is no longer active, etc...? I'm sending plain text emails, it's a plain old yahoo account, i'm certain no viruses are going out with my emails, does anybody else have this problem? CM __________________________________ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree