Do mentions still add users to an issue watch list?

[Jeramy]

We are running Jira DC 10.3. I have a user who was tagged (mentioned) on an issue. However, that user never received an e-mail from Jira. I've checked and the user does not have any rules configured in outlook, and they receive e-mails from other projects. 

We upgraded to Jira 10 recently and I'm not sure if something changed. 

The other part of this is that I added him as a watcher on a ticket, made a change where I tagged him, and he still did not receive the e-mail. However, others in the watch list did.

I'm stumped and would appreciate any help. Thank you.

[Mikael Sandberg]

One thing to check is if the user have access to the project, notifications will check permissions so if a user do not have access to the project they will not get notified even if they are mentioned/added as watchers.

[Jeramy]

@Mikael Sandberg - Thank you! I my case, the use can see the project. They brought it to my attention that they were tagged on a ticket, but never received e-mails. That project is configured to only send e-mails to "watchers". This person insisted that tagging used to add people to the watchers list. I thought it did as well, but it doesn't look like it does it anymore. 

Do you know if pre Jira 10, it did add users to the watch list?

[Mikael Sandberg]

It's been awhile since I used Jira DC, but as far as I am aware @ mention someone does not automatically add them as watchers. The thinking behind that is that it is up to the user to decide if they should watch the work item or not. You could have an automation that automatically add someone as watchers when they are mentioned.