Black Friday is the Super Bowl of email marketing. You plan. You schedule. You hit send. Then thousands of subscribers open your email and all they see is a broken image icon where your big offer should be.
That is exactly what happened to a major retailer this year. Their hero image did not load. Instead of a bold Black Friday deal, subscribers saw a placeholder error from an image hosting service. Look at the image above. I got their email with the mistake in it.
What Went Wrong With This Black Friday Email
The retailer used imgbb.com to host the main image in their Black Friday email. That image was the center of the offer. The problem? They were using a free account, and imgbb requires a Pro account for direct image embedding in emails and external sites.
So the email arrived. The email client tried to load the image. The host blocked it. The result was a broken email at the worst possible moment.
The bigger issue is what this tells us about their process. They likely skipped proper testing. If they had sent test emails to a few of their own addresses and checked in real inboxes, they would have seen the error before thousands of customers did.
The Simple Fix They Missed
The fix was easy. Upgrade to a Pro plan at the image host, or host images on their own servers or ESP instead of relying on a free image host with limits.
Even more important, they needed a strong pre-send checklist. That checklist should always include real inbox testing. Not just a preview inside the email platform. Actual test sends to multiple email services and devices.
One small process change could have saved that entire Black Friday push.
Common Email Marketing Mistakes That Hurt Your Campaigns
This Black Friday fail is a good reminder. Email campaigns rarely collapse due to one single cause. Often, the same sloppy habits create multiple problems over time. Here are other email marketing mistakes that can cost you money, deliverability, and trust.
1. Not Proofreading Before You Hit Send
Typos happen. Broken links happen. Wrong dates happen. The issue is sending without a final review. Every important campaign should have at least one person who checks:
- Subject line and preview text
- All links and buttons
- Prices, dates, and coupon codes
- Brand names and product names
A quick proofread can prevent embarrassing mistakes and angry replies from confused customers.
2. Skipping DMARC, SPF, and DKIM
Deliverability is not magic. You need to prove to inbox providers that your emails are legitimate. That is what SPF, DKIM, and DMARC do.
- SPF tells inboxes which servers can send email for your domain.
- DKIM adds a digital signature so receivers can verify the message is authentic.
- DMARC gives instructions on how to handle emails that fail SPF or DKIM checks.
If you ignore these records, your campaigns are more likely to land in spam or get rejected. You may think the campaign is weak. In reality, subscribers never even saw it.
3. Sending Without Testing in Real Inboxes
A preview inside your email platform is helpful, but it is not the full picture. Email clients all handle HTML differently. Dark mode changes colors. Some clients block images or strip styles.
Always send test emails to several addresses. Use different providers like Gmail, Outlook, and Yahoo. Open them on desktop and mobile. Check how the message looks, how quickly images load, and whether any content looks off.
If this retailer had followed that basic step, their broken Black Friday image would have been caught instantly.
4. Using Image-Only Emails With No Alt Text
Many marketers still send emails that are one big image. It might look great in a design tool. In real inboxes, it can be a mess.
- Images may be blocked by default.
- Slow connections delay the core message.
- Screen readers struggle without proper alt text.
Use real HTML text for headlines, body copy, and key offers. Reserve images for support. Add descriptive alt text so people still understand the offer if images fail.
5. Broken or Mismatched Links
Few things frustrate subscribers more than a call-to-action button that goes nowhere. Or a link that sends them to the wrong product page.
Test every link before sending. Click every button. Check that coupon codes are active and that landing pages match the promise in the email. Even one broken link in a big sale email can cost serious revenue.
6. Ignoring Mobile Users
Most people check email on their phones first. If your email is hard to read on mobile, they will not save it for later. They will delete it and move on.
Make sure your email is responsive. Use large enough fonts, clear buttons, and single-column layouts that adapt well on small screens. Test on both iOS and Android devices.
7. Sending Too Often or With No Clear Value
Sending emails every day with no clear purpose can burn out your list. Subscribers tune out. Unsubscribes creep up. Spam complaints increase.
Every email should have a clear reason to exist. A deal, an update, or something genuinely helpful. If you would be annoyed receiving it, your list will be, too.
8. Forgetting the Plain Text Version
Most email platforms let you send both HTML and plain text. The plain text version helps with deliverability and accessibility. Some email clients and security filters prefer or show the text-only version.
If you skip it, you miss a chance to look more authentic and user-friendly. Always include a clean plain text version that matches the message and offer.
9. Hiding or Making the Unsubscribe Link Hard to Find
You never win by trapping people on your list. If someone wants to leave and cannot find the unsubscribe link, they will mark you as spam instead.
That hurts your sender reputation and future campaigns. Make the unsubscribe link easy to see. It is better to have a smaller engaged list than a big angry one.
10. Ignoring Tracking and UTM Tags
If you are not tracking your email traffic, you are guessing. Add UTM tags so you can see how each email and campaign performs inside your analytics.
Track key metrics:
- Open rate and click-through rate
- Revenue per send
- Conversions by campaign and audience segment
That data helps you refine subject lines, timing, and offers over time.
Build a Simple Pre-Send Checklist
The retailer’s Black Friday error started with one missed upgrade on an image host. The deeper issue was a weak process. A simple, consistent pre-send checklist can protect you from that kind of public mistake.
- Confirm sending domain, SPF, DKIM, and DMARC.
- Proofread subject, preview text, and body copy.
- Check all links, coupon codes, and dates.
- Test in real inboxes on desktop and mobile.
- Confirm images are hosted properly and load fast.
- Review unsubscribe and preference links.
Email still delivers one of the highest returns of any channel. But it demands discipline. A few extra minutes before you hit send can save your campaign, your revenue, and your reputation.