WP Mailster v1.8.3 – WP Mailster

[Improvement] For address mode = TO (single recipient per email), pre-fill the email address in unsubscribe links
[Improvement] Stop using $_SESSION to avoid problems with WP health check etc.
[Improvement] Introduce various filters for altering the subscribe/unsubscribe endpoints headers, text, and buttons
[Improvement] Introduce filter wpmailster_email_processing_attachment_default_filename to override default attachment filename (mst_no_filename) if needed
[Bug Fix] Subscribe and unsubscribe dialogs can now be translated
[Bug Fix] Fixed unsubscribe problem: when for one email address, there is both a WordPress and a WP Mailster user, both get unsubscribed
[Bug Fix] License key can be saved in WP Mailster settings if ad-hoc check/validation fails
[Bug Fix] Change license backend callbacks to be executed server side (to avoid issues with CSP / Content Security Policy blocking in browsers)
[Bug Fix] Remove several PHP notices