On Oct 24, 2006, at 7:15 AM, Ron wrote:

>  Hi all,
>
>   I'm getting error messages from legitimate addresses on
>  one of my lists, which indicates that they are not getting
>  their mail when they should.  They appear to be yahoo
>  addresses.  Any ideas?

I haven't noticed an unusually high number of bounces from my yahoo  
subscribers lately. I suggest you try sending one or two of those  
subscribers a message from your Listserv server, but outside of  
Listserv to see what the bounced headers look like.