Biggest email mistakes: Avoid spam and boost deliverability

Why do your emails end up in spam for no clear reason? This course reveals the real causes — and most importantly, how to fix them — so you can boost your inbox rate from 60% to over 95%. You’ll discover how spam filters really work, from analyzing content and HTML structure to sender reputation and user behavior. We’ll walk you through the 7 most common mistakes that secretly destroy email deliverability: spammy subject lines, messy HTML, missing authentication (SPF/DKIM/DMARC), poor list hygiene, bad timing and frequency, overly salesy content, and lack of proper tracking. You’ll get a hands-on checklist to audit your own emails and a day-by-day action plan to clean, fix, and improve your sending strategy in just one week. The curriculum is crafted by top industry experts, ensuring practical value and easy application, whether you’re a beginner or a seasoned marketer. This course is your launchpad to reduce spam issues, increase open and click-through rates, and ultimately boost ROI from smarter, more strategic email marketing.