Problems with your system email can prevent you from sending email to clients or connecting to your mail provider.
The Mail tab in General Settings allows you to configure how WHMCS sends and manages email. You can choose and configure your mail provider, configure email headers and footers, and more.
You can choose from several supported mail providers for your WHMCS installation, including Google™, Mailgun, Microsoft®, PHP Mail, SendGrid, SMTP, or SparkPost.
You can configure Google as your mail provider using SMTP. This requires creating an app in the Google Cloud console and configuring SMTP as your mail provider.
You can configure Microsoft® as your mail provider using Microsoft Entra® ID (formerly Azure Active Directory). To do this, you will also need to create an app in the Microsoft Entra console.
You can configure SparkPost, SendGrid, or Mailgun as your mail provider.
You can configure SMTP as your mail provider. Make sure to choose the mail provider that offers the best service and security features for you.