All LISTSERV requires is that the userid@host be 80 characters or less for
a subscription.  Otherwise I don't think there is a restriction of any kind
(short of the usual SMTP restrictions) on the length of an address used to
post.  If there were a lot of those old X.400 addresses would have bounced :)

It sounds like there is a non-LISTSERV related problem in getting mail to
the server from that particular domain, given the symptoms you've reported.

Nathan

At 08:53 2002/12/03 -0500, you wrote:
>  Is there a limit on the size of an email address token that
>  Listserv will attempt?
>
>  We have a case with an address, [log in to unmask]
>  can send messages to Listserv, but messages to the list go
>  unrecognized (no bounce or anything.) Using another shorter
>  address, for a different subscription, works fine. This person
>  can receive mail but cannot post.
>
>  Thanks,
>  Jim Cocks - Louisville