> The better MTAs detect the too-common broken "MX ip.ad.re.ss" record
> and  interpret  the  intent  of the error and try to deliver the IP,
> rather  than  not deliver the mail at all, while logging an "invalid
> MX record".

To  my  mind,  this  particular  "forgiving"  policy simply encourages
less-than-attentive  sysadmins.  You  can  bet  that  plenty  of other
errors,  particularly  other  DNS  errors,  will  come along with this
blatant  misconfiguration,  and my conscience won't let me work around
it  --  I'm much less likely to work around this, for example, than to
allow  incoming  connections  without  PTRs and suchlike. Certainly, I
don't   even   see   any   reason   to  log  an  "error"  if  the  MTA
best-guesses/normalizes  the  RR  and  delivers anyway; who ever takes
action on that error?

Anyway,  there  are always sysadmin-specific (and site-specific) rules
regarding   whether   a   policy   encourages   the   "education"   of
partners/clients  vs. just making our end look bad. This is one policy
that  I  always  enforce  as part of the "education" category, while I
know  that  you  enforce  others  that  I  don't.  .  . an interesting
divergence.

--Sandy


------------------------------------
Sanford Whiteman, Chief Technologist
Broadleaf Systems, a division of
Cypress Integrated Systems, Inc.
e-mail: [EMAIL PROTECTED]



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