Appointment notifications

HI THERE
I want to use appointments notificatinon by gmail. I follow the step of https://www.open-emr.org/wiki/index.php/Sms_and_Email_Notification_Howtos
1.Adminstration >Globals>Notifications>SMTP server details
Note : SMTP User for Authentication use my email and SMTP Password for Authentication use my password
2.patient > Contacts>fill the gmail on contact and trusted email
3.Both gmail accs use less secure feature ON
4.Run cron tab and start cron service
5.Set appointment on open emr
It is all I do .No mail sent or received
Please help to sent email notifications

[APPOINTMENT REMINDERS BY GMAIL](https://sourceforge.net/p/openemr/discussion/202504/thread/a9ba118138/?limit=25