Hi Martin, I'm not authoritative on PII policies at all, but here's a couple of things that came to mind as I read your question. 2018-02-10 11:26 GMT+00:00 Martin Urbanec <martin.urbanec(a)wikimedia.cz>cz>: Does this mean the URL for a given email address can be guessed in at most 100 attempts by someone who doesn't control the address? I think you'd typically want to draw your random numbers from a much larger range, or use as token something that was encrypted or signed with a secret only your server knows. It would probably also make sense to make your URLs valid for only a certain time.

However... If creating a single mailing list is an option (for instance, you don't plan on customizing the emails per user), this seems like a very good way to go.

-- Guilherme P. Gonçalves _______________________________________________ Wikimedia Cloud Services mailing list Cloud(a)lists.wikimedia.org (formerly labs-l(a)lists.wikimedia.org) https://lists.wikimedia.org/mailman/listinfo/cloud

Well, username is *also* a private information according the page MarcoAurelio linked, so I would need to solve it anyway. I don't need to have the emails but what if somebody w/o account at WP would like to use this? M. so 10. 2. 2018 v 13:37 odesílatel Francisco Venancio < fvenancio(a)wikimedia.org&gt; napsal: -- Můj kalendář najdete na https://martin.urbanec.cz/calendar.html _______________________________________________ Wikimedia Cloud Services mailing list Cloud(a)lists.wikimedia.org (formerly labs-l(a)lists.wikimedia.org) https://lists.wikimedia.org/mailman/listinfo/cloud

Why not just make use of the Special:EmailUser function? Cyberpower678 English Wikipedia Account Creation Team English Wikipedia Administrator Global User Renamer On Feb 10, 2018, at 06:26, Martin Urbanec &lt;martin.urbanec(a)wikimedia.cz&gt; wrote: Hello, upon request at Czech Wikipedia's helpdesk I created a tool that sends notifications about new weekly articles by e-mail together with its first paragraph and link to it. To accomplish such a thing I need user's email, so I firstly decided to store it in a database. To prevent this tool from spamming I of course require its confirmation by accessing an URL with a random string (MD5 hash of user's email *and* random number from 1 to 100; I mean, those two things are in one hash). You can have a look at this tool at tools.wmflabs.org/wiki2email/. My question is: Is this okay? Should I add some kind of formal information to the tool? If so, is there some help page? Should I stop with collecting mails at all and use some WMF-maintained service for mass-emailing (mailman at lists.wikimedia.org maybe?) and make the tool to just send an email to the list itself? This question came to my mind before creating, so I do appologize for asking after programming. Best regards, Martin Urbanec -- Můj kalendář najdete na https://martin.urbanec.cz/calendar.html _______________________________________________ Wikimedia Cloud Services mailing list Cloud(a)lists.wikimedia.org (formerly labs-l(a)lists.wikimedia.org) https://lists.wikimedia.org/mailman/listinfo/cloud _______________________________________________ Wikimedia Cloud Services mailing list Cloud(a)lists.wikimedia.org (formerly labs-l(a)lists.wikimedia.org) https://lists.wikimedia.org/mailman/listinfo/cloud

On Sat, Feb 10, 2018 at 3:26 AM, Martin Urbanec &lt;martin.urbanec(a)wikimedia.cz&gt; wrote: You could also potentially use IFTTT ? E.g. advise everyone to use https://ifttt.com/applets/306821p-read-a-weekly-digest-of-featured-wikipedi… or for people who want it daily https://ifttt.com/applets/64419059d-receive-an-email-with-wikipedia-s-artic… I use https://ifttt.com/applets/64362538d-automatically-get-a-weekly-vocabulary-l… and thus get this once a week: http://storage9.static.itmages.com/i/18/0210/h_1518284828_5973154_9b0eebf21… (ignore the incorrect branding. Naming things (perfectly accurately) is hard.) docs / notes are at http://blog.hatnote.com/post/124069724187/wikipedia-and-ifttt-a-technical-g… Alternatively, if the editors/readers wanted a list of "the most edited articles of the week", then there's http://weekly.hatnote.com/ - There is not currently a Czech version, but adding that would be easier than reinventing the tool! :) HTH _______________________________________________ Wikimedia Cloud Services mailing list Cloud(a)lists.wikimedia.org (formerly labs-l(a)lists.wikimedia.org) https://lists.wikimedia.org/mailman/listinfo/cloud