https://bugzilla.wikimedia.org/show_bug.cgi?id=46640
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Bug ID: 46640
Summary: Add proper bounce handling to MediaWiki
Product: MediaWiki
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: Email
Assignee: [email protected]
Reporter: [email protected]
Classification: Unclassified
Mobile Platform: ---
It's likely that many Wikipedia accounts have a validated email address that
once worked but is out of date. We do not currently unsubscribe users who
trigger multiple non-transient failures and some addresses might be 10+ years
old.
We should not keep sending email that is just going to bounce. It's a waste of
resources and might trigger spam heuristics.
I'd propose adding two API calls.
One to generate a VERP address to use when sending mail from Mediawiki.
One that records a non-transient failure. That API call would record the
current incident and if there had been some threshold level met, eg at least 3
bounces with the oldest at least 7 days ago, then it would un-confirm the
user's address so mail will stop going to it.
For at least the second call, authentication will be needed so fake bounces are
not a DoS vector or a mechanism for hiding password reset requests.
The reason for the threshold is that some failure scenarios will resolve
themselves, eg mailbox over quota, so we don't want to react to one bounce. We
want a history of consecutive mails bouncing.
There would be Mediawiki development component to this task to build the API,
to add VERP request calls wherever email is sent, and an Ops component to
route VERP bounces to a script (taking the mail as stdin, and optionally e.g.
the e-mail address as arguments), which can then call the (authenticated)
MediaWiki API method to remove the mail address.
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