There may be multiple reasons why you don't get emails from JETI.
Go to Incoming Emails in JIRA Administration and check if your SMTP server settings are correct. Send a test email to various email addresses (in and outside JIRA) to verify that emails will reach all recipients.
Also check if email sending is enabled or disabled.
Email This Issue respects your profile settings "My changes: do not notify". If this is set and you are testing JETI by sending emails to yourself, JETI will not dispatch the email to you.
We recommend that you change your profile settings to "My changes: notify me" for time of your tests.
JETI can send issues in email directly to users and email addresses. Also indirectly to recipients stored in fields, members of groups and roles, etc. Sometimes it happens that no indirect recipients can be resolved in relation to an issue.
After you created a Notification Template with Events and recipients, you must associate the Notificaiton Template with projects. You do this by adding the Notificaiton in a Context. There is a detailed tutorial on this topic.
The Configuration tab offers a few options to limit recipients.
Contexts and Notifications may be restricted to fine grained scopes via JQL. It may be possible that the issue the event is occuring on does not match any of the JQLs.
Event Notifications may be restricted cases when certain fields change. If you specified a Changelog filter in the configuration and none of the selected fields change, you will not receive notifications.