Nice update but...
I also verified that I already allowed access to less secure applications.
Only needed to try a password change... but it did not work either
:((
The problem is clearly with your Google account authentication. It has nothing to do with Traccar server. I would recommend searching for the answer on Google forums or StackOverflow.
A moment ... now every time I press the test button send email ... I receive this short message in my Gmail inbox: "Unknown type"
It means that everything is working.
YEEEEESSSS... thanks Anton !!!
After changed my password (Gmail account), notifications email working:
Device: Arturo
Status is unknown
Time: Tue Jan 03 23:05:37 UTC 2017
Device: Arturo
Online
Time: Tue Jan 03 23:05:40 UTC 2017
Device: Arturo
Moving
Point: XX°, XX°
Time: Tue Jan 03 23:11:28 UTC 2017
Device: Arturo
Stopped
Point: XX°, XX°
Time: Tue Jan 03 23:11:48 UTC 2017
This might help:
http://stackoverflow.com/a/25238515/2548565