$msg is an arrayref, dereference it before passing to $self->respond. Before this, the SMTP responses contained the reference stringification instead of the real message, when a plugin denied the mail at the DATA stage:     554 ARRAY(0x9362f10)
$msg is an arrayref, dereference it before passing to $self->respond.
Before this, the SMTP responses contained the reference stringification
instead of the real message, when a plugin denied the mail at the DATA
stage:
 
  554 ARRAY(0x9362f10)

git-svn-id: 6e7a7971b1024e6b6028729f590d7800a6049a23@881 958fd67b-6ff1-0310-b445-bb7760255be9

gh/ghqp,gh/ghqp