> Thanks, Andrew. Will "norenew" prevent automatic unsubs resulting from
> excessive bouncing, or only prevent those resulting from "failure" to
> renew?

Norenew will only prevent deletion by failing to renew their 
subscription.Actually, they are just never prompted to renew. If 
'Probe' is a Renewal=  option, then  Norenew will also stop passive 
probing for that subscriber.

There is just no way to prevent auto-deletion (on a per subscriber 
basis) for bouncing as long as a subscriber's mail server is throwing 
permanent errors, which are recognized by LISTSERV®. 

In the case of this Webtv user, I see the server is throwing a 
permanent error for a temporary problem (mail box full). If it were 
using a temporary error code, this wouldn't be happening. I see more 
and more ISPs doing this these days. 

Personally I like it as I would rather see them deleted if they 
aren't interested enough to keep their mail box cleaned out to get 
their list mail.