void send(int(100..999) code, array(string)|string|void lines)
Send an SMTP-style return-code.
code is an SMTP-style return-code.
If lines is omitted, errorcodes will be used to lookup an appropriate error-message.
If lines is a string, it will be split on "\n" (newline), and the error-code interspersed as appropriate.
"\n"
errorcodes