Hi, Ana Andrade Please follow these steps.
I keep hearing that people have trouble or got errors while sending emails from their own personal environment in Outsystems. I have done that in my personal cloud. So here we go,
Steps to send email from your personal environment,

- Log in to the service center, go to the Administration tab and then click on Email Menu.
- Use google's SMTP server if you don't have one.
- Use port 587 or 465.
- Username and password will be your Gmail mail ID and password.
- You can set the default sender here, if no one is mentioned for the sender then this mail will be used.
- The test List address is to send a copy of the mail to comma-separated address lists.
- Save the settings.
- After saving go to one of the application modules and do a publish to affect the changes.
- Now you are all done with the email configuration.
Gmail configuration steps,

- Login to your google account.
- Click on Profile Icon --> manage your google account --> Security,
- Now turn off two-step verification.
- Turn On Less Secure App Access.
- That's it.
Errors while sending emails?
- Don't worry, sometimes google won't trust the third party access.
- So that we need to change our Gmail password.
- Important:- After a password update, you need to enter the updated password in the service center Email configuration above and save the changes.
- Then do a publish again in your module.
- Now try sending emails, It Should work!!