With change https://gerrit.wikimedia.org/r/#/c/239582/ T56130 I added a new key 'emailuser' to $wgEchoDefaultNotificationTypes, because in my opinion getting an email notification about the fact, that a user sends you a email seems useless.
It is possible to avoid the override on wmf wikis for $wgEchoDefaultNotificationTypes['emailuser']? Thanks
Looks like we're also making welcome notifications send an email with this override... But yes, I think we need to deal with the emailuser part before 1.26wmf24 hits non-test sites tomorrow.
Change 240259 had a related patch set uploaded (by Alex Monk):
Copy default $wgEchoDefaultNotificationTypes['emailuser'] into wmf-config
Change 240259 merged by Alex Monk:
Copy default $wgEchoDefaultNotificationTypes['emailuser'] into wmf-config
This is sort of done but I'd like to hear what @Catrope has to say about the welcome config before closing.
Sorry for the late response.
Not sending an email for welcome notifs seems fine. I'll write a config patch for that after running it by @Jdforrester-WMF.
Change 245578 had a related patch set uploaded (by Catrope):
Remove override of $wgEchoDefaultNotificationTypes
Change 245578 merged by jenkins-bot:
Remove override of $wgEchoDefaultNotificationTypes