From:  <vszak...@users.sourceforge.net>
Sent: Sunday, December 13, 2009 2:49 PM
Subject: [Harbour] SF.net SVN: harbour-project:[13234] trunk/harbour

> Revision: 13234
> http://harbour-project.svn.sourceforge.net/harbour-project/?rev=13234&view=rev
> Author:   vszakats
> Date:     2009-12-13 13:49:14 +0000 (Sun, 13 Dec 2009)
>
> Log Message:
> -----------
> 2009-12-13 14:46 UTC+0100 Viktor Szakats (harbour.01 syenar.hu)
>   * contrib/hbwin/mapi.c
>     + Added support for unlimited number of recipients and
>       attached files. Please test and review.

Viktor, did you read RFC 5321 carefully, especially the section quoted
below?

/----
4.5.3.1.8.  Recipients Buffer

   The minimum total number of recipients that MUST be buffered is 100
   recipients.  Rejection of messages (for excessive recipients) with
   fewer than 100 RCPT commands is a violation of this specification.
   The general principle that relaying SMTP server MUST NOT, and
   delivery SMTP servers SHOULD NOT, perform validation tests on message
   header fields suggests that messages SHOULD NOT be rejected based on
   the total number of recipients shown in header fields.  A server that
   imposes a limit on the number of recipients MUST behave in an orderly
   fashion, such as rejecting additional addresses over its limit rather
   than silently discarding addresses previously accepted.  A client
   that needs to deliver a message containing over 100 RCPT commands
   SHOULD be prepared to transmit in 100-recipient "chunks" if the
   server declines to accept more than 100 recipients in a single
   message.
\----

How do you manage 100-recipient chunks? To prevent spamming, many free 
accounts have even non-standard restrictions, e.g. 20 emails per hour.

-- 
Regards from The Harbour Project mirror in Poland
Andrzej P. Wozniak



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