The System Tab contains an Sub tab name as Email Settings

From Here The Email Settings can be Updated as per requirements
From eMail ID : All Emails in the system will be sent from this email id

Password : From Here we can update the Password
SMTP Host : From Here we can update the SMTP Host
SMTP Port : From Here we can update the SMTP Port
Email Content Type : From Here we can update the Email Content Type
SMTP Encryption : From Here we can update the SMTP Encryption
Click Update Email Settings to the Update Email Settings or Reset to Reset the form.