[Mailman-Users] Bounces being detected as spam/virus sending rate

Mark Sapiro mark at msapiro.net
Sun May 10 19:16:05 CEST 2015

On 05/09/2015 10:51 PM, Steven D'Aprano wrote:
> Thanks Mark. According to that, there are currently 12 bouncing members. 
> But when I run the more detail script below, I get 30 bouncing members. 
> What's the difference between the two?

bin/list_members --nomail=bybounce lists those members whose delivery is
currently disabled by bounce processing because their bounce score
reached threshold. These are members that haven't yet been removed, but
will be after they've received and not responded to
bounce_you_are_disabled_warnings warning notifications.

These will show in the get_bounce_info output with
 current score >= bounce_score_threshold
 last bounce date in the recent past
 email notices left < bounce_you_are_disabled_warnings
 last notice date in the recent past
 confirmation cookie = a hex string

The other 18 are either stale or currently bouncing but not yet
disabled. They will all have
 current score < bounce_score_threshold
 email notices left = bounce_you_are_disabled_warnings
 last notice date = (1970, 1, 1)
 confirmation cookie = None

The difference between stale and current is whether last bounce date is
older than today - bounce_info_stale_after days.

> I currently get Uncaught bounce notifications, and process them by hand 
> as they come in.

Please send them to me or post them here so we can improve the heuristic
bounce recognition. You may sanitize them by munging email addresses to
a form like user at example.com, list-bounces at example.com, etc. and if the
original list post is included, you may replace it with a note, but
otherwise we would like the exact headers and MTA boilerplate from the

> I also see unsubscribes. Is there a way I can be 
> notified of *caught* bounce notifications?

If you set bounce_notify_owner_on_disable to Yes, you will get a notice
including the actual bounce DSN when the member's delivery is first
disabled by bounce. Beginning in Mailman 2.1.19, you can set
bounce_notify_owner_on_bounce_increment to Yes to receive a similar
notice every time a member's bounce score is incremented, i.e., for at
most one bounce per member per day.

Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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