From: Wietse Venema (wietseporcupine.org)
Date: Fri Feb 01 2008 - 07:55:18 CST

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Rocco Scappatura:
> Hello,
>
> My SMTP gateway gives always this error:
>
> dsn=4.4.2, status=deferred (delivery temporarily suspended: conversation
> with srv5.stt.loc[10.3.253.16] timed out while sending end of data --
> message may be sent more than once)
>
> every time that the recpient is more than one.
>
> At:
>
> http://www.postfix.org/lists.html#lists
>
> I have foud something of similar. But I'm not fully persuased because I
> get the message above is destined to two ore more recipients.

The SMTP RFC requires that a server can accept 100 recipients.

/etc/postfix/master.cf:
    borked unix - - n - - smtp

/etc/postfix/transport:
    example.com borked:

Execute "postmap /etc/postfix/transport".

/etc/postfix/main.cf:
    transport_maps = hash:/etc/postfix/transport
    borked_destination_recipient_limit = 1

Execute "postfix reload".

        Wietse

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