Can't send evo mail in Severn

[dsavage at peaknet.net]

I did a from-scratch install of Severn last week, then restored my
~/evolution directory from a backup of my Shrike system. Since then, I've
been unable to send outbound mail thru my ISP's sendmail. The error I get
is:

     Error while performing operation:
     MAIL FROM response error: Command unrecognized: ""

Has anyone else seen this behavior? (This msg sent via squirrelmail, not
evo.)

--Doc Savage
  Fairview Heights, IL