Updating SMTP outgoing email settings to specific Web Application in SharePoint 2010

Updating SMTP outgoing email settings to specific Web Application in SharePoint 2010:
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 By default , we will configure the new SMTP Server details at 

Central Administration : Outgoing E-Mail Settings .




But some times, the new SMTP server details may not reflect in all the web applications.

At that time I faced email sending issues from one particular web application.

For this , we need to manually go and verify all the web application settings from Central Admin Page as mentioned below:





with this , we can verify the new SMTP server configured for all the web applications in the FARM.