Martijn Brinkers: > I use an after queue filter to filter incoming email. When the filter > queue grows because email comes in faster than it can handle the filter > returns a 450 until the filter queue is empty again. Now when email is > received in a big burst it can happen that the filter queue temporarily > grows and then temporarily blocks. The default settings for redelivery > (queue_run_delay, minimal_backoff_time etc.) are suitable for delivery > of external email but I would like these settings to be different for > email sent to the filter. With the default settings it takes a 'long' > time before Postfix detects that the filter again accepts email. > > Is it possible to have different queue_run_delay, minimal_backoff_time > etc. settings for the filter transport?
Yes. Use another Postfix setup (with its own main.cf, master.cf, queue directory and data directory). You can do this with every Postfix release, but Postfix 2.6 makes it easier with one command to start and stop. All Postfix versions: http://www.postfix.org/postconf.5.html#alternate_config_directories Postfix 2.6: http://www.postfix.org/postfix-wrapper.5.html Wietse
