On Sun, 6 Jun 1999 03:03:20 -0400, "Alan S. Dobkin" <[log in to unmask]> wrote:

>Error-Text: Mailer mxnx.berlinetz.de said:
>"550 '<[log in to unmask]>SIZE=35126'
>sender address target 'LISTSERV.CC.EMORY.EDU' is not a valid e-mail
>domain (there is no MX record for it)."

I think the problem is the lack of a space after ~.EDU> and before SIZE=35126
so it is looking for the domain  'LISTSERV.CC.EMORY.EDU>SIZE=35126'  which is
invalid and does not exist.  The error message in this case is misleading.