+ $!=0;
+ $message->smtpsend( Host => $smtpmachine )
+ or $message->smtpsend( Host => $smtpmachine, Debug => 1 )
+ or return "(customer # ". $self->custnum. ") can't send invoice email".
+ " to ". join(', ', grep { $_ ne 'POST' } @invoicing_list ).
+ " via server $smtpmachine with SMTP: $!";