You can send emails from a single ID from all modules in the CRM, even if the emails are being sent by multiple CRM users. Follow these steps to set the default sender email:
	- Log in to Vtiger CRM.
 	- Go to Settings. The Settings page opens.
 	- Navigate to Configuration > Email Settings. The Email Settings page opens.
 	- Locate the option to set the default sender email address.
 	- Enter the email address you want to use as the default sender.
 	- Click Save to apply the default sender email address setting.
 	- Ensure that this email address complies with your domain authentication requirements and that the necessary SPF and DKIM records are properly configured.
 
By following these steps, you can set the email address as the default sender across all modules in Vtiger CRM.