Lately, the Listserv here has been generating an unsual number of error
messages involving Yahoo addresses. The messages all refer to a "No valid
From: line in message". This is with Listserv 1.8d running under Compaq
Tru64-Unix 4.0f. Does anyone know what's causing this and if its a problem
on Listserv or with Yahoo?

A sample of such an error message is:

<[log in to unmask]>:
205.180.60.143 failed after I sent the message.
Remote host said: 552 No valid From: line in message