As disscussed on talk page, "Reply-to email address in the emails sent to participants will be the event-organizer's address. There is no indication in the interface that this information will be disclosed to the recipients."

Change #1294484 had a related patch set uploaded (by ZhaoFJx; author: ZhaoFJx):

[mediawiki/extensions/CampaignEvents@master] add: Warning Message for Email Disclosure

https://gerrit.wikimedia.org/r/1294484

@ifried @JFernandez-WMF Hi, could you help with the copy and design here? The proposal in review is Note that your email address will be disclosed in the Reply-To field to all participants. inside a notice widget:

@Daimona thx for the ping! since this message would only provide information, i would move from an in-line styled message (which is mostly used for validation on inputs) to a standard notice message. for the copy, i'm wondering if we can make it simpler and more straightforward, what about something like: 'Your email address may (or 'will'?) be visible to participants'. i'm curious if a term like 'reply-to' would be slightly technical for folks, but maybe not?

In T379289#11981484, @JFernandez-WMF wrote:

'Your email address may (or 'will'?) be visible to participants'.

Yeah, I'd use "will".

i'm curious if a term like 'reply-to' would be slightly technical for folks, but maybe not?

I had the same doubt. On the one hand, it accurately describes how the email will be visible. OTOH, tt is indeed a technical term, and strictly speaking, the statement may not necessarily be true on certain MW installs (MW can be configured such that the sender's address is used directly in "From", although I imagine nobody does that in production).

So, all in all, Your email address will be visible to participants. would work for me if it's good for you.

Will is better.

I have modified the code to align with above ideas.

@JFernandez-WMF Here's what we have right now, if it looks good to you I'll approve it:

hi @Daimona that looks good to me, thank you!

Change #1294484 merged by jenkins-bot:

[mediawiki/extensions/CampaignEvents@master] SpecialEventDetails: add warning message for email disclosure

https://gerrit.wikimedia.org/r/1294484