New Assignment group: users not receiving "incident assigned to you" email notification

[Suzanne Coffman]

I created three new Assignment Groups that went live this morning.  All members of the group are existing users who have received incident notification emails in the past. The first incident assigned to one of these groups had and "Assigned to" user selected at the same time it as assigned to the new group. No "incident has been assigned to you" email was sent to the Assigned to. I checked our email notification, and the out-of-the-box "Incident assigned to me" is active. Condition assigned_toVALCHANGES^assigned_toISNOTEMPTY^EQ.
What do I need to do to make sure that email notification s are sent out?

[Cobee]

First thing I would check is if the user has notifications disabled, if the assigned to has this notification disabled it won't send, this can be confirmed in the email logs. Second, I would check if the 'Send to Event Creator' option is enabled on that notification under advanced settings. Third, confirm the notification is set to send to 'Assigned To'.

[Sagar Pagar]

Hi @Suzanne Coffman,

Take a look at kb. It will help you.

Troubleshooting Outbound Email 

Troubleshooting email issues with ServiceNow 

Thanks,
Sagar Pagar