On Tue, 5 Aug 2008, SM wrote:
At 09:32 AM 8/5/2008, Tony Finch wrote:
"When a mail message is to be delivered to multiple recipients, and
the SMTP server to which a copy of the message is to be sent is the
same for multiple recipients, then only one copy of the message SHOULD
be transmitted."
That favors one connection over using a different connection for each
recipient as that can cause resource issues.
It says nothing about connections: you can send multiple copies of a
message down the same connection.
If you are going to temporary fail the transaction because the first
recipient got a 4yz reply, you may end up never being able to attempt a
delivery for the other recipients.
I know that, but there's evidence that some implementers don't understand
it.
Tony.
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