Although you can sign up for turboSMTP with a free email account like Gmail, Hotmail, or Yahoo!, only accounts with a custom domain are enabled for sending.

The reason is simple: free email accounts are often used by spammers to send fraudulent messages, and they do not allow configuration of configure DKIM, DMARC and SPF, essential protocols to ensure higher deliverability.

Since protecting our server performance is a priority (and, therefore, providing the best service for our clients), sending is only possible with accounts tied to a real domain (e.g., info@yoursite.com).

We therefore suggest signing up with a business account and properly configuring SPF, DKIM, and DMARC to get the best results with turboSMTP.