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? Thanks, Martijn Brinkers
