# File lib/protocols/smtpserver.rb, line 371
371:                 def process_rcpt_to rcpt
372:                         unless @state.include?(:mail_from)
373:                                 send_data "503 MAIL is required before RCPT\r\n"
374:                         else
375:                                 succeeded = proc {
376:                                         send_data "250 Ok\r\n"
377:                                         @state << :rcpt unless @state.include?(:rcpt)
378:                                 }
379:                                 failed = proc {
380:                                         send_data "550 recipient is unacceptable\r\n"
381:                                 }
382: 
383:                                 d = receive_recipient rcpt
384: 
385:                                 if d.respond_to?(:set_deferred_status)
386:                                         d.callback &succeeded
387:                                         d.errback &failed
388:                                 else
389:                                         (d ? succeeded : failed).call
390:                                 end
391: 
392: ??
393:                         end
394:                 end