07494: Adding List-Unsubscribe header for token - LimeSurvey bugs and feature requests

This bug affects 1 person(s).

4

ID	Project	Category	View Status	Date Submitted	Last Update

07494	Feature requests	Survey participants (Tokens)	public	2011-06-20 07:48	2019-04-24 10:31

Reporter	seancarlos	Assigned To
Priority	normal	Severity	feature
Status	acknowledged	Resolution	open

Summary	07494: Adding List-Unsubscribe header for token
Description	List-Unsubscribe is a mail message header used to provide machine readable unsubscribe instructions - an email address, a URL or both. If List-Unsubscribe is present, some mail clients will offer a unsubscribe button and/or unsubscribe option if a user tries to flag the message as spam. It is a recommended 'best practice' to improve message deliverability and do the right thing for the end user. Documentation: http://www.faqs.org/rfcs/rfc2369.html http://www.list-unsubscribe.com/ Gmail support: https://mail.google.com/support/bin/answer.py?answer=81126#unsub http://techcrunch.com/2009/07/23/gmail-tries-to-make-it-easier-to-unsubscribe-from-spam-newsletters-but-fails/ Microsoft support: http://download.microsoft.com/download/e/3/3/e3397e7c-17a6-497d-9693-78f80be272fb/enhance_deliver.pdf (although may be broken?): http://blog.deliverability.com/2011/04/has-hotmail-discarded-the-list-unsubscribe-functionality.html
Additional Information	A possible solution: List-Unsubscribe Implementation Need to add unsubscribe email address and URL fields to UI + data structure. Consider validating for well formed email / urls. If one or both are present, add List-Unsubscribe header to email messages. This probably needs to be done as part of global settings with the option to override it at the survey level, including suppressing global settings if present.
Tags	No tags attached.

Bug heat	4
Story point estimate
Users affected %

DenisChenu 2011-07-29 02:51 developer ~24373	First things to do is a global blacklist functionnality. Optout URL is only for one survey, maybe a checkbox for a global black listing. After this functionnality can be used for List-unsuscribe, but LS is a PHP script, not a mailing list manager :)

joekaapa 2019-04-23 18:11 reporter ~51554	After seeing that only after adding List-Unsubscribe header to mails sent to gmail addresses I was able to avoid spam folder, I'd like to ask if there are any plans for this? It's been 8 years quite soon and List-Unsubscribe is still considered as a good practice as far as I understand. Shouldn't this be rather simple? Just a checkbox to enable/disable per survey + a configurable field for the unsubscribe mail address. Implementation wise there seems to be a functionality for adding custom headers to the email already -> Use the optout url and the configurable unsubscribe mail address to form the List-Unsubscribe header. No need to think of a global black listings or how the unsubscribe email address inbox is being treated.

DenisChenu 2019-04-23 18:24 developer ~51556	I already have the plugin to do it for 4.0 using new events : https://github.com/LimeSurvey/LimeSurvey/commit/de63762472630ab797db4ae65899a53c165eef70#diff-7d3d8e9dcd030b4be92f267328c3c15e Or you can use https://gitlab.com/SondagesPro/mailing/eventBeforeTokenEmailExtended and create a simple plugin https://gitlab.com/SondagesPro/mailing/eventBeforeTokenEmailExtended/blob/master/eventBeforeTokenEmailExtended.php#L74

Date Modified	Username	Field	Change
2016-12-08 10:39	c_schmitz	Category	Tokens => Survey participants (Tokens)
2019-04-23 18:11	joekaapa	Note Added: 51554
2019-04-23 18:24	DenisChenu	Note Added: 51556
2019-04-24 10:31	DenisChenu	Summary	List-Unsubscribe rationale => Adding List-Unsubscribe header for token
2019-04-24 10:31	DenisChenu	Additional Information Updated