[Bug 8166] New: BB 1.23.1 sendmail: sending DATA before RCPT

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=8166

           Summary: BB 1.23.1 sendmail: sending DATA before RCPT
           Product: Busybox
           Version: 1.23.x
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P5
         Component: Other
        AssignedTo: unassigned at busybox.net
        ReportedBy: bugzilla at unassailable.info
                CC: busybox-cvs at busybox.net
   Estimated Hours: 0.0


It appears that sendmail is sending DATA command before RCPT, breaking ability
to send mail.

RFC821 - "There are three steps to SMTP mail transactions.  The transaction
      is started with a MAIL command which gives the sender
      identification.  A series of one or more RCPT commands follows
      giving the receiver information.  Then a DATA command gives the
      mail data.  And finally, the end of mail data indicator confirms
      the transaction."

Device:
Buffalo WZR-HP-AG300H
3.10.71-rc1 #10284 Thu Mar 5 01:34:58 CET 2015 mips GNU/Linux
DD-WRT V24-sp2 std

Command:
sendmail -S <server>:<port> -d <domain> -f <from> -au<username> -ap<password>
-v <rcpt><<EOF
Subject: test

Body
EOF


Stdout:
sendmail: send:'NOOP'
sendmail: recv:'220 REDACTED  ESMTP' REDACTED
220 REDACTED  ESMTP
sendmail: recv:'250 OK' REDACTED
250 OK
sendmail: send:'EHLO REDACTED'
sendmail: recv:'250-REDACTED hello [REDACTED], REDACTED' REDACTED
sendmail: recv:'250-HELP' REDACTED
sendmail: recv:'250-AUTH LOGIN PLAIN' REDACTED
sendmail: recv:'250-SIZE 31457280' REDACTED
sendmail: recv:'250-PIPELINING' REDACTED
sendmail: recv:'250-8BITMIME' REDACTED
sendmail: recv:'250 OK' REDACTED
250 OK
sendmail: send:'AUTH LOGIN'
sendmail: recv:'334 REDACTED' REDACTED
334 REDACTED
sendmail: send:''
sendmail: recv:'334 REDACTED' REDACTED
334 REDACTED
sendmail: send:''
sendmail: recv:'235 ... authentication succeeded :: REDACTED' REDACTED
235 ... authentication succeeded :: REDACTED
sendmail: send:'MAIL FROM:<REDACTED>'
sendmail: recv:'250 <REDACTED> sender ok' REDACTED
250 <REDACTED> sender ok
sendmail: send:'DATA'
sendmail: recv:'503 need RCPT before DATA' REDACTED
503 need RCPT before DATA
sendmail: send:'QUIT'
sendmail: recv:'221 REDACTED  closing connection' REDACTED
221 REDACTED  closing connection

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