Given that this has reoccurred and from the emails you provided looks to be duplication on the application layer I think we need to rope in some people on the Mediawiki side. @larissagaulia do you know who might be a first point of contact?

And now I just got a resend of a different email to a different user, originally sent on April 11. That’s something like two out of three emails I’ve sent using «Email this user» the last month+ that are getting resent.

Random e-mail from today for an edit:

Confirm, neither have I. Hope it will not recur.

But now I haven't gotten any more copies since April 5, so whatever it was seems to have cleared for now. It's probably still a good idea to dig through the logs to get an idea what caused this since it could very well happen again and at larger scale.

In wikitext (,.;? followed by whitespace or text end will trigger URL termination just before.

We have a similar problem on mentioning plain URL in wikitext, interpreting terminating interpunction characters as part of surrounding text rather than part of URL. The same goes for many messaging tools.

@Xover Yes, that is exactly the notification I get repeatedly alongside with each repeated email.

In T361860#9694838, @Jan.Kamenicek wrote:

… it floods my alerts in the Wikimedia projects.

I am the original recipient of the message by Xover discussed above. I confirm that I also still keep getting the message again and again. So far it has been resent to me 18 times. It is quite annoying not only because of the repeated messages themselves, but also because it floods my alerts in the Wikimedia projects.

In T361860#9693188, @jhathaway wrote:

@Xover if you could paste the headers of two of the messages that would help, the whole raw text would be the best however. I am curious how identical the emails are, as that would help indicate where they are being duplicated.

@Xover if you could paste the headers of two of the messages that would help, the whole raw text would be the best however. I am curious how identical the emails are, as that would help indicate where they are being duplicated.

In T361860#9691600, @Xover wrote:

In T361860#9691323, @DannyS712 wrote:

@Xover I created https://phabricator.wikimedia.org/P59624 that is restricted to WMF-NDA members and the subscribers of the paste (currently you), which should be secure to put the full headers

Thanks. But Phab still won't let me edit that paste. Only members of WMF-NDA and the author have the "Can Edit" capability...

And now another two ticked in.

In T361860#9691600, @Xover wrote:

@Aklapper is this by design, or just permissions accidentally set too tightly?

For ceeations, I think we just need to add you into phab trusted-contribs, I can do it when I'm back at my laptop if someone doesn't do it before me

In T361860#9691323, @DannyS712 wrote:

@Xover I created https://phabricator.wikimedia.org/P59624 that is restricted to WMF-NDA members and the subscribers of the paste (currently you), which should be secure to put the full headers

@Xover I created https://phabricator.wikimedia.org/P59624 that is restricted to WMF-NDA members and you, which should be secure to put the full headers

Clinic duty SRE here -- I/F, can you start investigating this at the MTA end? Triaging this to High in case it's widespread, but feel free to decrease if it turns out it's not.

Hi @Twiggy1977, thanks for taking the time to report this and welcome to Wikimedia Phabricator! For future reference, please use the bug report form (linked from the top of the task creation page) to create a bug report, and fill in the sections in the template, instead of deleting them. Thanks.

I'm removing the observability tag because directly addressing emails generated by services owned by other teams falls outside the scope of the observability team.