On 11/12/10 10:27 AM, "Jeroen Geilman" <[email protected]> wrote:
> On 11/12/2010 07:06 PM, Rob Tanner wrote: >> Is there a limit on incoming messages on a single connection? 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 don¹t >> 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 ? > The connects and disconnects are logged and I don¹t see multiple connects from the client (i.e., I don¹t see a connect followed by another connect without a disconnect in between). And from your comments above, it¹s clear that the client disconnected from the server and not the other way around which strongly suggests that this is an outlook/user issue and not at all related to the server. > > 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 >> >> >
