MailGenius is issuing an urgent warning to marketers and e-commerce businesses: Tougher spam filters ahead of Black Friday could devastate holiday campaigns

(PRUnderground) October 14th, 2025

Each year, inbox providers like Gmail, Outlook, and Yahoo refine their filtering algorithms to handle the surge in promotional traffic that begins weeks before Thanksgiving. The result? Legitimate marketing campaigns from trusted brands can land in spam or become throttled due to higher scrutiny and stricter sender reputation checks.

“We see the same panic every year,” said Troy Ericson, CEO of MailGenius. “Businesses wait until their Black Friday campaign tanks to realize their deliverability has been slowly slipping for weeks. By then, it’s too late. The inbox providers don’t care how great your offer is; they care about your sender reputation and perceived email quality.”

MailGenius, an industry-leading email deliverability testing platform, helps marketers identify and fix issues before they reach a crisis point. With its advanced spam filter simulation and inbox placement testing, users can see exactly where their emails are landing across Gmail, Outlook, and other major providers. The platform also provides help with BIMI and email authentication checks for SPF, DKIM, and DMARC records, three critical components for avoiding spam classification during high-volume periods.

The company’s consulting services also give brands a human edge, pairing users with deliverability experts who can identify domain reputation risks, troubleshoot authentication issues, and guide proper warm-up strategies for large holiday sends. “Every email that lands in spam this season represents lost revenue,” Ericson said. “We’re helping brands take control now, not after their most profitable campaign of the year is ruined.”

During November, inbox providers expect record-breaking traffic: billions of emails sent daily from retailers, SaaS platforms, and e-commerce businesses. To maintain user trust and prevent phishing attempts, algorithms grow more aggressive in filtering what they perceive as “risky” or overly promotional content.

Even clean, verified senders aren’t immune. “Most senders don’t realize that spam filters evolve dynamically,” Ericson explained. “What passed last month might fail this month. If you don’t run a pre-send check with a mail tester now, your Black Friday and Cyber Monday campaigns may never reach your audience.”

Run a free deliverability test or schedule a consultation with a MailGenius expert today at www.MailGenius.com and make sure the most critical campaigns hit primary inboxes this holiday season.

About MailGenius

MailGenius provides email deliverability services to test and help businesses understand and navigate the complex world of email deliverability. Their goal is to ensure that every email lands in the primary inbox, not the spam folder.

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Original Press Release.