Animated GIF signatures, 'Dear [First Name]', and other email fads we all fell for

Open your own sent folder from ten years ago and it’s a small museum. A newsletter with a hero image so large it took three seconds to load on a train connection. A signature with a spinning company logo GIF underneath your name, because someone in marketing insisted it “added personality.” An email that opened with “Dear [First Name],” merge tag left exposed, sent to several thousand people who all, that morning, got proof their vendor’s system had glitched. Email marketing has run through more visual fashions in twenty-five years than almost any other channel, mostly because the technology kept changing faster than anyone’s taste could catch up — new rendering capability shows up in the major mail clients, someone builds something flashy with it, everyone copies the flashy thing until it stops converting, and the pendulum swings back toward whatever felt genuine before the flashy thing existed. Here’s the tour, era by era, and what actually killed each trend.

Era one: the mail-merge years, and its famous failure mode

Long before “personalization” meant behavioral segments and dynamic content blocks, it meant one thing: your first name, inserted automatically into a templated block of text. Mail merge itself predates email marketing by decades — it’s a document-automation feature that goes back to 1970s and 80s word processors, adapted to email the moment bulk-sending tools existed to use it on. Every email platform since the 1990s has offered some version of Hi {first_name}, and for a while, just seeing your own name in an email felt genuinely novel rather than automated.

The fad had one legendary, recurring failure mode that anyone who worked in email during this era has a version of: the merge field breaks, and thousands of recipients get “Dear [First Name],” or “Hi ,%%FIRST_NAME%%,” sent with total sincerity, usually right before a big promotional push where someone was rushing. It became such a reliably embarrassing mistake that it turned into its own cautionary genre inside marketing teams — the send you tell new hires about. The lesson that survived it wasn’t “stop personalizing.” It was “always send a real test to yourself first,” which remains true and remains, somehow, still occasionally ignored.

Era two: image-heavy HTML newsletters

Once broadband made large images practical to load and design tools made building HTML emails accessible to non-developers, the pendulum swung hard toward newsletters that looked more like a magazine spread than a message — full-width hero photography, multi-column layouts, decorative dividers, sometimes barely any actual live text at all, just one enormous image with the copy baked into the graphic. It photographed well in a slide deck. It also created two durable problems that took years to fully solve: images that didn’t load by default (many inboxes blocked remote images unless the recipient explicitly trusted the sender, leaving a blank gray box where the entire message used to be), and layouts that looked fine on a desktop monitor and completely broke on the small screens that were about to become most of email’s actual audience.

That second problem is what actually forced the era to end: as mobile email reading overtook desktop through the early-to-mid 2010s, “responsive” templates — layouts that reflow and resize for a phone screen — went from a nice-to-have to table stakes almost overnight, because a newsletter that required pinch-to-zoom on a phone was a newsletter that got deleted unopened. Design teams spent years building single-column, thumb-friendly templates specifically to undo the multi-column, desktop-first habits the image-heavy era had trained into everyone.

Era three: the animated GIF phase

GIFs in marketing email had a genuine moment, roughly the mid-2010s, once most major mail clients finally supported rendering them reliably (a technical hurdle that took longer than it should have — Outlook desktop famously only ever played the first frame for years, so a “GIF” in Outlook was often just a static image of whatever the animation happened to start on). Once support caught up, GIFs became the easy way to add motion without building an actual interactive email, and they showed up everywhere: product demos compressed into a three-second loop, countdown timers, and — the one that outlived the rest — the animated logo or headshot in an individual sender’s email signature.

The signature GIF specifically had an odd afterlife. It became a small personal-branding flex for individual salespeople and founders well after brands had mostly moved on from GIF-heavy newsletter bodies, because a signature only renders once per reply thread rather than blasted to a whole list, so the “distracting” complaint that killed GIFs in newsletter bodies never quite applied the same way to a signature. It’s one of the only fads on this list that never fully died — it just shrank down to a much smaller, more personal use case where the tradeoffs actually made sense. The same era also produced a smaller, sillier cousin: the emoji subject line, dropped into the front of a headline to grab attention in a crowded inbox list view. It worked, for a while, precisely because it was novel — and it stopped working for the same reason everything on this list eventually stops working: once every sender in a recipient’s inbox is doing it, none of them stand out anymore, and the novelty converts into visual noise instead.

Era four: the deliverability correction

By the mid-2010s, a countervailing force started reshaping design choices that had nothing to do with taste: spam filtering got dramatically better at reading the structure of a message, not just scanning for banned words. An email that was one giant image with almost no real text, dense with tracking pixels and marketing-suite branding in the footer, started reading to increasingly sophisticated filters as a classic spam signature — even when the content itself was completely legitimate. Deliverability teams began pushing back on design teams for the first time, and “does this render as mostly real text, with a reasonable image-to-text ratio” became a genuine constraint on visual design, not just an engineering afterthought.

That shift mattered more for cold outreach and one-to-one style sending than for newsletters, because a heavily designed HTML template is also the single fastest way to make a message look like a mass blast rather than a real note from a person — and that distinction is exactly what determines which side of a mailbox provider’s classifier a message lands on.

Era five: the plain-text comeback

The most recent swing is, in a lot of ways, a full return to where the first era started — except now it’s a deliberate choice instead of a technical limitation. Through the late 2010s and into the 2020s, independent newsletters and a growing number of B2B senders moved back toward plain, minimally formatted emails that read like a message from an actual person rather than a marketing department: no hero images, no multi-column layout, sometimes no HTML formatting at all beyond a line break and a link. Nieman Journalism Lab documented this shift among independent writers and publications explicitly, describing a preference for the format that feels like “a letter from a friend” over one that feels like an ad.

Two forces pushed this at once. Recipients, buried under two decades of increasingly polished marketing design, started treating “looks handmade” as a trust signal rather than a production shortfall. And mailbox classifiers, per the deliverability correction above, generally treat plain, text-forward messages as more likely to be genuine one-to-one correspondence — which means the format that reads as more human to a person also tends to read as more human to the algorithm sorting the inbox. For cold outreach specifically, that alignment isn’t a coincidence marketers stumbled into; it’s the entire reason plain, personal-sounding cold email consistently outperforms designed HTML templates in reply rate, not just in vibes.

What the whole cycle actually teaches

Look at the shape of it end to end: personalization, then visual richness, then motion, then a correction back toward restraint, then a full swing back to plain text — twenty-five years, and the destination looks almost identical to the starting point, just with better reasons behind it this time. Every fad on this list optimized for something real (attention, polish, personality) and every one eventually ran into the same wall: mailbox providers and recipients both, independently, reward mail that reads like it came from a person who meant it, and punish mail that reads like it came from a system that didn’t.

That’s not a nostalgia trip — it’s the operating principle Norbelys is built around today. Templates and variables exist for structure and speed, not to turn your outreach into the image-heavy blast era all over again, and every send is built to read as an individual message rather than a mass campaign, because that’s what actually lands in the inbox in 2026, not just what happens to look good in a deck. If two decades of trend cycles taught the industry anything, it’s that the fads come and go and “write like a real person, to a real person” just keeps winning. Start sending outreach built on that principle from day one — no signature GIFs required.