A woman with a magnifying glass stands near a large envelope with an @ symbol, surrounded by security icons, graphics and SPF, DKIM, DMARC signatures.
Authentication technologies help make email sending reliable and effective

Email marketing remains one of the most effective communication channels for businesses. It helps not only to promote products and services but also to build long-term relationships with clients, increase loyalty, and drive users back to your website. However, high efficiency is only achievable through proper technical setup and strategic planning. In this article, we’ll dive deep into how to optimize your email campaigns — from essential authentication settings to advanced performance analytics.