: Ensure the provider supports SPF , DKIM , and DMARC . These protocols verify your identity and are required by major providers like Gmail and Outlook in 2026.
: Avoid shared IPs where your reputation can be damaged by other users' spam. A dedicated IP gives you full control over your sender score. buy smtp
When you look to buy SMTP, prioritize these technical features to ensure your emails don't end up in the spam folder: : Ensure the provider supports SPF , DKIM , and DMARC