#5955 - Many fixes and improvements to List-Unsubscribe

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Identifier #5955
Issue type Minor issue (breaks specific functionality)
Title Many fixes and improvements to List-Unsubscribe
Status Completed
Tags

Roadmap: v11 (custom)

Type: Legal compliance / Privacy (custom)

Handling member PDStig
Version 11 beta2
Addon core
Description There were many glaring issues with List-Unsubscribe. This hotfix fixes / changes the following:

1) List-Unsubscribe target config should have been a line, not a tick.
2) Added '1' as an option to List-Unsubscribe target (which is the new default); if set to '1', the target will be the new data/unsubscribe.php endpoint.
3) Added data/unsubscribe.php; mail clients are starting to require use of the http/https POST method of List-Unsubscribe and rejecting mailto. This endpoint (with the provided correct nonce and checksum) will add an e-mail address to the new unsubscribed_emails table. The mail dispatch will filter out e-mails that exist in this table regardless of priority.
4) Mail dispatch was not properly adding the List-Unsubscribe headers. This is fixed (but not fully tested yet; see notes as I will post when they have been fully tested). Swift Mailer was also not setting them at all.
5) Added List-Unsubscribe post config option (also a line). If the target is a URL, this can be POST data to send to the URL. email_address is always passed automatically by the software.
6) Added can_email_address function for checking if we can e-mail a specific address. This will also now check unsubscribed_emails in addition to mail bounces.
7) can_email_member is now a wrapper for can_email_address.
8) Added a warning on a member profile's edit settings screen if can_email_member returns false. It instructs the member that they are not receiving e-mails from the site and possible reasons why (no e-mail set, unsubscribed through their mail client, or received a bounce-back in the last 8 weeks) along with what to do.

Reminder this is not fully tested yet. It will undergo testing for v11 beta3.
Steps to reproduce

Funded? No
Commits

Fixed MANTIS-5955 (Many fixes and improvements to List-Unsubscribe) (1cc56572) · Commits · Composr ecosystem / Composr · GitLab
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