i am getting some bounced message from mail server. please suggest me about this. Nothing has been changed in server.i am getting this problem only with some domain.

Posted on 2009-12-23
Last Modified: 2013-12-17
The original message was received at Thu, 24 Dec 2009 11:42:39 +0530 from []

   ----- The following addresses had permanent fatal errors ----- <>
    (reason: 550-HLO-SYN: HELO (glyph) is syntactically invalid )

   ----- Transcript of session follows ----- ... while talking to
>>> DATA
<<< 550-HLO-SYN: HELO (glyph) is syntactically invalid <<< 550
550 5.1.1 <>... User unknown <<< 503-All RCPT commands were rejected with this error:
<<< 503-HLO-SYN: HELO (glyph) is syntactically invalid <<< 503-
<<< 503 Valid RCPT command must precede DATA

Question by:aloknet21
    LVL 3

    Expert Comment


    This error occurs on two condition.

    1: If u Mail box exceeded
    2.If u mistype your mail domain.

    LVL 1

    Author Comment

    sorry everything is fine. one thing i have noticed here. when i open /etc/aliases file and save this file and run newaliases command it shows me and error.
    WARNING: local host name (glyph) is not qualified; see cf/README: WHO AM I?
    /etc/aliases: 263 aliases, longest 46 bytes, 9950 bytes total

    please suggest me.
    LVL 39

    Accepted Solution

    Following the link provided in the error you get the answer:

    your system tells the remote system that's it's name is glyph...
    while it actualy is (or whatever is your domain...)


      dig -x {yourip}

    of if you don't have dig, nslookup...

    That is the name that needs to be provided by YOUR SMTP server when connecting to a remote system
    and sending the first packet (HELO, or EHLO).

    Qualified means that the domain is part of the hostname. THe remote system may do a reverse lookup (on the address) to verify if
    the name provided does actualy match the ip address given. as well as a forward lookup on the HELO provided name to see it it actualy gives the IPaddress of your server.
    (this as part of anti-spamming measures).


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