On 11/12/2010 07:06 PM, Rob Tanner wrote:
Hi,
Our admissions office sends out mass mailings to prospective students,
anywhere from 5,000 to 25,000 at a time. They are mail-merged and
sent via outlook to the postfix server, one recipient per message.
The user reports that outlook sends out 500 messages and then stops.
If he restarts outlook, it will send out another 500 and then stop
again. If he leaves it overnight, it might send several more thousand
by morning. When I look in the mail logs, somewhere around 500
messages, followed by a disconnect. What I don't know is whether
outlook is disconnecting or whether postfix is closing the connection.
Examine the log more carefully.
If the client disconnects, this is logged as "postfix/smtpd[PID]:
disconnect from hostname[IP]".
Unless the client exceeded a configured error limit, postfix will not
disconnect the client.
Is there a limit, configurable or otherwise, to the number of
messages postfix can receive on a single connection? And at that
point, does postfix close the connection to the client?
How do you know it is a single connection ?
If this known-to-be-fairly-braindead MUA sends each message on a new
SMTP connection, postfix may well exceed the configured error limit and
start throttling the client.
You need to figure out what is really happening :)
Thanks,
*Rob Tanner
*UNIX Services Manager
Linfield College, McMinnville Oregon
--
J.
