Le 23 févr. 2012 à 02:01, phoebe ayers a écrit : Thank you for pointing me on your older bug that I didn't find on Bugzilla before I submitted this current bug. The aim was different but the solution to be found is the same. I haven't seen a proposed patch neither by yourself nor anyone else, am I wrong? Concerning the patch submitted, and in order to have an idea of the pertinence of it for other MediaWikis sites than mine and Wikipedia too, I am asking people having access to the standard user database of their wikis to process this next mysql command. The question is how many people are sharing a unique e-mail with several usernames? mysql -u wikiadmin -p wikidb mysql> select email_freq, COUNT(email_freq) FROM (select user_email, COUNT(user_email) as email_freq FROM prefix_user WHERE user_email <> "NULL" GROUP BY user_email ) AS DISTRIB GROUP BY email_freq; Here is the result on mine: +------------+-------------------+ | email_freq | COUNT(email_freq) | +------------+-------------------+ | 1 | 3047 | | 2 | 22 | | 3 | 1 | +------------+-------------------+ On the above example, 22 users have 2 usernames having the same e-mail. 1 have 3, and all the others have an e-mail link to a unique username. I suppressed the number of people having no e-mail authenticated (NULL). The benefit of this patch won't be as good on Wikipedia user table, but I would be happy if you know who I can ask in order to get the results. I was guessing 90% but I am probably pessimistic... -- Nicolas