{"id":4253,"date":"2025-12-17T09:00:38","date_gmt":"2025-12-17T09:00:38","guid":{"rendered":"https:\/\/www.warmy.io\/blog\/black-friday-deliverability\/"},"modified":"2025-12-17T09:00:38","modified_gmt":"2025-12-17T09:00:38","slug":"black-friday-deliverability","status":"publish","type":"post","link":"https:\/\/www.warmy.io\/blog\/black-friday-deliverability\/","title":{"rendered":"Black Friday Deliverability Horrors: Turn Chaos Into Success"},"content":{"rendered":"<p><b><i>Every year, Black Friday evolves into more than just a single day of shopping frenzy. It has become a full-fledged digital battleground where billions of dollars in revenue are at stake.<\/i><\/b><\/p>\n<p><span>In 2025, US shoppers alone spent a record <\/span><a href=\"https:\/\/www.emarketer.com\/content\/black-friday-2025-sales-growth-ecommerce-mobile-genai\" rel=\"noopener\" target=\"_blank\" rel=\"noopener noreferrer\"><b>$11.8 billion online on Black Friday<\/b><\/a><span>, reinforcing the day\u2019s status as a pivotal moment in the retail calendar. That\u2019s just eCommerce in the US, and that\u2019s just Black Friday itself. We\u2019re not even including the entire peak season which generates high spending too.<\/span><\/p>\n<p><span>With this surge in consumer spending comes an equally dramatic spike in email volume as brands and companies compete for attention in inboxes.\u00a0<\/span><\/p>\n<p><span>That\u2019s where email deliverability becomes not just a technical concern, but a business-critical discipline. During high-pressure events like Black Friday, when email volume skyrockets and sending reputations are tested, <\/span><b>deliverability determines who reaches the inbox and who gets lost in the noise<\/b><span>.\u00a0<\/span><\/p>\n<h2><strong>Into the Black Friday abyss: key factors of the experiment<\/strong><\/h2>\n<p><span>In our latest research, the Warmy Research Team aimed to determine:<\/span><\/p>\n<ul>\n<li><span>How the seasonal surge in campaign volume impacted deliverability for many senders<\/span><\/li>\n<li><span>How structured warm up using Seed List enabled new accounts to steadily build inbox placement throughout the high-pressure period<\/span><\/li>\n<\/ul>\n<p><span>We created two groups:<\/span><\/p>\n<ul>\n<li><span>Overall user base<\/span><\/li>\n<li><span>Separate cohort of users who joined in November and relied on the Seed List feature for warming up<\/span><\/li>\n<\/ul>\n<p><span>The team observed and recorded daily deliverability rate for the entire month of November,<\/span><\/p>\n<h2><strong>Key finding #1: The Black Friday deliverability drop<\/strong><\/h2>\n<p><span>Black Friday is synonymous with promotions and email marketers know this all too well. However, it is this flood of promotional emails that come with a significant risk: <\/span><b>the strain it places on your sender reputation.<\/b><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"Bar graph illustrating Black Friday deliverability among Warmy users from Nov 1 to 30. Deliverability starts at 82.3% and steadily declines to 37.2% by the end of the month, highlighting Black Friday deliverability trends.\" height=\"600\" src=\"https:\/\/warmy-blog-wordpress-bucket.s3.amazonaws.com\/wp-content\/uploads\/2025\/12\/17085632\/BF-Warmy-Users.webp\" width=\"800\" title=\"\"><\/p>\n<p><span>Internal data during the Black Friday month showed a drop in overall deliverability rate for Warmy users. From around 74.8% to 82.3% to a staggering 37.2% to 38.6% by the end of the month.<\/span><\/p>\n<h3><strong>What does this mean?<\/strong><\/h3>\n<ul>\n<li><span>This sharp decline reflects a deteriorating sender reputation. ESPs begin to view the high number of promotional emails as potential spam or irrelevant content, leading to stricter filters and blocking actions, all of which significantly hurt inbox placement.<\/span><\/li>\n<li><span>The deliverability drop paints a clear picture of how this surge affects real-world email campaigns globally.\u00a0<\/span><\/li>\n<li><span>The decline is not just theoretical, but it is a consequence of failing to account for seasonal fluctuations.<\/span><\/li>\n<\/ul>\n<h3><strong>What are the consequences of declining deliverability?<\/strong><\/h3>\n<p><span>Declining deliverability rates have immediate implications and long-term consequences:<\/span><\/p>\n<p><b>When deliverability tanks, there is a significant drop in open rates.<\/b><span> With fewer emails landing in the inbox and more being marked as spam or rejected outright, customers simply won\u2019t see your messages. When open rates drop, click-through rates, response rates, and conversion rates soon follow.<\/span><\/p>\n<p><b>Long-term risks include decreased sender reputation, and challenges in future inbox placement.<\/b><span> A sharp drop in deliverability during Black Friday doesn\u2019t just affect your current campaigns. It sets off a chain reaction. Spam complaints, bounced emails, and unengaged recipients (due to emails being ignored or relegated to spam) all contribute to a negative sender reputation score.\u00a0<\/span><\/p>\n<p><span>If your emails continue to land in spam or don\u2019t get delivered at all, you face an uphill battle with every future campaign. Email service providers are reluctant to trust senders with poor reputations, and it can take some time to recover from the damage done.<\/span><\/p>\n<h2><strong>Key finding #2: The seed list as a lifeline and structured warm up saves the day<\/strong><\/h2>\n<p><span>The second group observed was composed of users who joined in November and relied on the Seed List feature for warming up during the same period. <\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"Bar chart showing Black Friday deliverability for new Warmy users using seed lists, with deliverability rising from 39.2% on November 1 to 96.1% by November 30. Warmy logo displayed at the bottom.\" height=\"600\" src=\"https:\/\/warmy-blog-wordpress-bucket.s3.amazonaws.com\/wp-content\/uploads\/2025\/12\/17085707\/BF-Seed-List.webp\" width=\"800\" title=\"\"><\/p>\n<p><span>The contrast was striking. Users who relied on warm up strategies using Warmy\u2019s Seed List enjoyed up to <\/span><b>96% deliverability<\/b><span> by the end of November.<\/span><\/p>\n<h3>What does this mean?<\/h3>\n<ul>\n<li><span>Seed List warm up mimics organic sending behavior, which helps email providers recognize sending domains as trustworthy, rather than a potential spammer. By steadily increasing sending volume and engagement, Seed List ensures that emails are more likely to land in the inbox, even during periods of intense sending activity.<\/span><\/li>\n<li><span>This surge in deliverability proves that a structured warm up process can have an immediate and powerful effect on inbox placement, even during a period when many marketers are struggling.<\/span><\/li>\n<\/ul>\n<h2><strong>Navigating the Black Friday chaos with data-driven insights and warm up tools<\/strong><\/h2>\n<p><span>Every time Black Friday approaches, many email marketers are left to face the chaos of an overwhelmed inbox. However, as our internal study demonstrated, email deliverability isn\u2019t entirely random. It follows certain predictable patterns based on your sending habits, reputation, and email infrastructure.<\/span><\/p>\n<p><span>Looking ahead, the key to successful Black Friday campaigns lies in early preparation. As we\u2019ve seen, Seed List warm ups are effective for avoiding the usual pitfalls of high-volume email sending.\u00a0<\/span><\/p>\n<p><b>For more in-depth data and findings on Black Friday deliverability, <a href=\"https:\/\/warmy-blog-wordpress-bucket.s3.amazonaws.com\/wp-content\/uploads\/2025\/12\/17090127\/Warmy-Research-Report-Black-Friday-and-Deliverability.pdf\" rel=\"noopener\" target=\"_blank\" rel=\"noopener noreferrer\">check out our full research report here.<\/a><\/b><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Every year, Black Friday evolves into more than just a single day of shopping frenzy. It has become a full-fledged digital battleground where billions of dollars in revenue are at stake. In 2025, US shoppers alone spent a record $11.8 billion online on Black Friday, reinforcing the day\u2019s status as a pivotal moment in the [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":4937,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[120],"tags":[],"class_list":["post-4253","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-email-best-practices"],"acf":[],"lang":"en","translations":{"en":4253},"pll_sync_post":[],"_links":{"self":[{"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/posts\/4253","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/comments?post=4253"}],"version-history":[{"count":0,"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/posts\/4253\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/media\/4937"}],"wp:attachment":[{"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/media?parent=4253"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/categories?post=4253"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.warmy.io\/blog\/wp-json\/wp\/v2\/tags?post=4253"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}