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ezmlm-limit(1) General Commands Manual ezmlm-limit(1) NAME ezmlm-limit - Limits traffic to list SYNOPSIS ezmlm-limit [ -f file ][ -dDF ][ -t secs ][ -n msgs ] dir ezmlm-limit is intended to limit traffic to a list in case an outside source sends excessive messages. Traffic is limited by converting the list to a message moderated list, or by deferring messages. ezmlm-limit reads dir/loopnum. If it does not exist or contains a time stamp more than secs seconds old, it is updated. If it exists, con- tains a time stamp less than secs seconds old, and msgs messages or more have passed since dir/loopnum was created, ezmlm-limit creates dir/modpost. For lists set up with ezmlm-store(1) this results in fu- ture messages being moderated. As long as dir/modpost does not exist, ezmlm-store(1) will simply for- ward the message to ezmlm-send(1). Once dir/modpost exists, messages will be queued for moderation. Thus, in case of error (such as miscon- figured auto responders) subscribers are spared messages in excess of the limit. However, no messages are lost, since the moderator(s) can (selectively) approve queued messages. If dir/modpost already exists, ezmlm-limit will not take any action. Resetting the list requires manual removal of dir/modpost. Queued mes- sages can be managed with regular moderation or approved in bulk with ezmlm-accept(1). ezmlm-limit is not required for normal lists, since qmail and ezmlm loop detection prevent problems caused by regular bounces. However, it affords some protection against malice, and severely misconfigured sub- scribers. OPTIONS -d Defer excess traffic. Excess messages are deferred and qmail will re-deliver. As a consequence, traffic will be throttled to the maximum allowed. Due to qmail delivery back-off, messages may not be disseminated in the order received. If traffic is continuously above or close to the limit, some messages may be delayed for a long time or even bounced. -D (Default.) Make the list moderated once excess traffic is de- tected. This requires the list to be configured up with ezmlm- store(1) rather than ezmlm-send(1), which is easiest done by first creating a message moderated list, then removing dir/mod- post. -n msgs Trigger after msgs messages (default 30). -f file Instead of dir/loopnum use file as the time stamp. This allows the use of multiple instances of ezmlm-limit for the same list. For instance, you may allow 60 messages per hour with one in- stance and 150 messages per day with another. If file is rela- tive, this is relative to dir. -F (Default.) Use dir/loopnum as the time stamp. -t secs Check the number of messages within period of secs seconds (de- fault 3600 seconds). SEE ALSO ezmlm-accept(1), ezmlm-make(1), ezmlm-send(1), ezmlm-store(1), ezmlm(5) ezmlm-limit(1)
NAME | SYNOPSIS | OPTIONS | SEE ALSO
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