I have a weird routing problem that seems to make no sense. incoming SMTP mail with .dwg attachments (Autocad drawings) are translated to notes mail at the gateway mail server, but seem to get lost when transferred from the mail server to one destination server. They are not left in the mail.box of the gateway machine, and the transfer fails to the destination server.
Internal mail (not going via this one destination server) seem fine, outgoing mail seems fine, and zipping the files seems to allow the files to transfer.
Any help gratefully received!