# SMTP settings It's recommended that you set up the sender either with an SMTP account, or via gmail to improve the chances of reaching inbox instead of being marked as spam. After you set up your account information, try [testing it with the available tool](/about/how-to-use/e-mail-notifications/testing-email-settings.md). Some of the most common errors include using the wrong settings, not enabling the required SSL options or even having the port blocked by your server's firewall (usually on CentOS). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.projectsend.org/about/how-to-use/e-mail-notifications/smtp-settings.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.