On 8/4/2011 2:39 PM, Geoffrey R Hardin wrote: > We are running Postfix on a SuSE 11 SP 1 host, using ClamAV and > ClamSMTP to scan mail messages. Mail delivery and reception works > great. Had some issues with duplicate mail messages that we fixed > with a global procmailrc file. The one remaining problem we have is > that when we send mail to a relatively large mail alias (441 > addresses), the system will process through 284 addresses and flag > the message as unsent and put it back in the queue with the error > message "mail transport unavailable". Unfortunately, the system is > on a separate network so I can't easily post configuration files, > but if someone knows where I could start looking, I can post > specific configuration items. > > For example, I have tried increasing the number of open files in the > /etc/security/limits.conf (up to 32k), I have increased several > values in the /etc/clamd.conf file to see if I was running into some > resource limitation (increased MaxThreads, StreamMaxLength, and > MaxQueue); I have done the same for clamsmtpd.conf (increased > MaxConnections to 1023; it wouldn't let me set it to 1024). Within > master.cf I have set the post-processing smtpd service option > smtpd_client_connection_count_limit and > smtpd_client_connection_rate_limit to 0 to disable them. It seems to > me that somewhere I am running into a resource limit, but I can not > find any trace of what or where. > > Thanks, > > Geoff >
Start here: http://www.postfix.org/DEBUG_README.html pay particular attention to: http://www.postfix.org/DEBUG_README.html#logging If you need more help, we need detailed information of the configuration and standard (NOT verbose) logging. Without such information we're just guessing. My first guess is that this isn't a resource problem and the logs have more detail in a different message. http://www.postfix.org/DEBUG_README.html#mail -- Noel Jones
