{

return "" unless (-x '/usr/bin/make-srv');

$OUT .= "# SRV Records for Email services\n";
$OUT .= `/usr/bin/make-srv -service _imap._tcp.$DomainName -target $SystemName.$DomainName -port 143`;
$OUT .= `/usr/bin/make-srv -service _imaps._tcp.$DomainName -target $SystemName.$DomainName -port 993`;
$OUT .= `/usr/bin/make-srv -service _smtp._tcp.$DomainName -target $SystemName.$DomainName -port 25`;
$OUT .= `/usr/bin/make-srv -service _smtps._tcp.$DomainName -target $SystemName.$DomainName -port 465`;

}
