[Bug 7070] New: My SMTP server rejects Busybox SENDMAIL request

bugzilla at busybox.net bugzilla at busybox.net
Mon May 5 22:21:47 UTC 2014


https://bugs.busybox.net/show_bug.cgi?id=7070

           Summary: My SMTP server rejects Busybox SENDMAIL request
           Product: Busybox
           Version: 1.15.x
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: critical
          Priority: P5
         Component: Networking
        AssignedTo: unassigned at busybox.net
        ReportedBy: devashish.negi at gmail.com
                CC: busybox-cvs at busybox.net
   Estimated Hours: 0.0


I am using busybox sendmail version v1.15.3. Using sendmail After the
SYN-ACK-ACK TCP handshake, the first message busybox sendmail issues is "NOOP".
This appears to be against RFC 2821 section 3.2

3.2 Client Initiation

   Once the server has sent the welcoming message and the client has
   received it, the client normally sends the EHLO command to the
   server, indicating the client's identity.

For my customer, his SMTP server rejects the busybox sendmail client request,
as it does not want the client to send anything per section 3.2.   Please let
me know if it is a RFC violation and if there is any workaround for this
problem.

The packet capture logs are attached.

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