The email client installed on my computer opens every time I click the Email icon to write an email. Is there a way to use Vtiger to compose emails?

Your email client opens because you have not set Vtiger's email composer as default. 


Follow these steps to use Vtiger's email composer as a default to write emails:

1. Click the User Menu on the top right corner of the screen.
2. Click the My Preferences button. This will redirect you to the My Preferences page.
3. Click the Edit icon on the right side of the page.
4. Scroll down to the Vtiger Usage Preferences block.
5. Enable the checkbox under the Use Vtiger's Mail Composer? field.
6. Click Save.