Re: Postfix rejecting NDRs with 501 5.5.4 Bad message size syntax ?

From: Victor Duchovni (no email)
Date: Thu Mar 01 2007 - 15:40:30 EST

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    On Thu, Mar 01, 2007 at 03:27:35PM -0500, Charles Marcus wrote:

    > >>Actually there is something you may be able to do:
    > >>
    > >> smtpd_discard_ehlo_keyword_address_maps =
    > >> cidr:/etc/postfix/esmtp_by_ip
    > >>
    > >>esmtp_by_ip:
    > >> # Replace 192.0.2.NNN/25 with real CIDR blocks of MXlogic proxies.
    > >> 192.0.2.0/25 size,silent-discard
    > >> 192.0.2.128/25 size,silent-discard
    >
    > >Yup, this (and the Postfix SMTP client equivalent) was meant to
    > >work around broken peers selectively, that is, without affecting
    > >connectivity with correctly implemented peers.
    >
    > Thanks Victor (and Wietse) - now at least I have a workaround - although
    > I'm not sure I should implement it immediately (that might give them an
    > excuse not to fix it permanently)... well, if they say they won't fix
    > it, at least I can on my end...

    Note, this assumes that when your ESMTP EHLO response does not include
    "SIZE", no "SIZE" information will be sent, that may not be the case depending
    on how the proxy is implemented. This will often work, but not always.

    -- 
    	Viktor.
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