>"Failed message: reason - 'Job has invalid or missing From: information.'"

OIC, your sysadmin applied some special validations in the email server.

FYI, the listserv is sending "Universal Thread for Visual FoxPro" for the "From:" header. This should not represent a problem. It's true that normally we have a name like "Michel Fournier" for the "From:" header but this should work fine as it is working for all the 100 members of the listserv.