If your instance is not configured to send out email, you have several options to choose from. One option is to use a service called SendGrid. You can sign up on their site and obtain an API key. To start using with WordPress, you simply install a plugin called WP Mail SMTP and supply the API key on the plugin and off you go. I use Contact Form 7 to send out email from a form. There are no issues using Contact Form 7 and SendGrid. In addition to SendGrid, the plugin also works with other email providers such as AWS, Gmail, Outlook, Zoho, Mailgun to name just a few.
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I'm Ulysses, Cloud Engineer at Cardinal Health based in Columbus. This blog is about Linux and Cloud technology. When off the grid, I enjoy riding my electric skateboard. I've surfed, snowboarded and played the saxophone in the past. I hope you find this website helpful. It's powered by WordPress and hosted on AWS LightSail.