+sub email_sender_transport_or_error {
+ my $domain = shift;
+
+ my %smtp_opt = ( 'host' => $conf->config('smtpmachine'),
+ 'helo' => $domain,
+ );
+
+ my($port, $enc) = split('-', ($conf->config('smtp-encryption') || '25') );
+ $smtp_opt{'port'} = $port;
+
+ if ( $conf->exists('smtp-username') && $conf->exists('smtp-password') ) {
+ $smtp_opt{"sasl_$_"} = $conf->config("smtp-$_") for qw(username password);
+ } elsif ( defined($enc) && $enc eq 'starttls') {
+ return "SMTP settings misconfiguration: STARTTLS enabled in ".
+ "smtp-encryption but smtp-username or smtp-password missing";
+ }
+
+ if ( defined($enc) ) {
+ $smtp_opt{'ssl'} = 'starttls' if $enc eq 'starttls';
+ $smtp_opt{'ssl'} = 1 if $enc eq 'tls';
+ }
+
+ Email::Sender::Transport::SMTP->new( %smtp_opt );
+
+}
+