Hi,

i have configured outgoing SMTP and its working fine. Problem is that i have create a Alert on one of my list but i am not getting any alerts from my list.

tell me what could be an issue and how to fix it.

Hi,

Would like to get some more information and check few settings:

1. Is it not working of a particular list or web application or in entire farm?

2. Alerts not working all the time or Stopped working Recently?

3. Are there any latest updates or Service Packs installation done?

4.Check alerts are enabled for your web application:

Stsadm.exe -o getproperty -url http://SharePoint-web-App-URL -pn alerts-enabled
This should return <Property Exist="Yes" Value="yes" />

If you dont get this, Enable alerts by:
stsadm.exe -o setproperty -pn alerts-enabled -pv "true" -url http://SharePoint-web-App-URL

5.Verify the Timer Jobs & Properties

Check whether the "Immediate Alerts" job is enabled for your web application. check these properties:
job-immediate-alerts
job-daily-alerts 
job-weekly-alerts

stsadm.exe -o getproperty -url "http://Your-SharePoint-web-App-URL" -pn job-immediate-alerts

The expected output is:

<Property Exist="Yes" Value="every 5 minutes between 0 and 59"/>.  

If you dont get this, run the following command to change its value.

stsadm.exe -o setproperty -pn job-immediate-alerts -pv every 2 minutes between 0 and 59" -url http://Your-SharePoint-web-App-URL

Please have a look as the following article which might help you:

Alerts in SharePoint 2010 (Troubleshooting)

Hope this helps :)