https://bugzilla.wikimedia.org/show_bug.cgi?id=65629
Bug ID: 65629
Summary: Harden mail server against incoming spam
Product: Wikimedia Labs
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: Unprioritized
Component: tools
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Web browser: ---
Mobile Platform: ---
Currently, the mail queue has a handful of outgoing bounces that relate to
mails to [email protected] (an existing mail address) that were tried to
be forwarded to that user's address, but didn't succeed.
The problem with that is that the recipients of those bounces (i. e. the
senders of the incoming mails) are from non-existing domains and/or users.
The mails are in Chinese and contain spreadsheet attachments. User "user"
seems to be Chinese, but my gut tells me that this is spam.
So before we become the target of more of that, we should harden the mail
server so that it only accepts mail from domains that actually resolve (and/or
other similar anti-spam best practices for exim).
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