Configure SMTP for outbound emails
Horde can be configured to use either a local mail agent or a third-party SMTP server. For more information, refer to the Horde documentation.
To configure the application to use other third-party SMTP services for outgoing email, such as SendGrid, refer to the FAQ.
NOTE: If you are using Gmail as the outbound email server and have experienced issues trying to send emails correctly, check the Gmail SMTP troubleshooting page to learn the causes of these issues and how to solve them.