Hello, brianvy!
I believe that upon registering to Enjin, notifications via email are
enabled by default. Therefore, there is a chance that the people you want to contact could recieve these notifications via their email. I have an alternate Enjin account that I know I have never changed any settings on, and the settings are below (view spoiler). Therefore, I believe those are the
default notification settings for
everyone.
(If Enjin hasn't changed their default settings in the past couple of years).
(For those on the
Enjin Mobile app, the following images are supposed to be in a
Spoiler)
Spoiler: Enjin Default Notification SettingsShow
Based on the (most likely) default Notification settings, your friends will get notified via email if you send them a private message. Keep in mind, this is only if they did not change their notification settings. But there is a high chance that they didn't.
To view and change your notification settings, go
here.
To view a support article relating to this, and learn how to disable email notifications
here.
I wish you the best of luck in contacting your friends from back then. I can relate to the same situation. I wish I could get in contact with some friends I used to have, but am no longer in contact with. I hope they get back to you.
Best regards,
Jay | Enjin user