Black Friday is the Super Bowl of email marketing, and your subject line is your opening play.
With inboxes flooded with hundreds of promotional emails, you’ve got maybe two seconds to catch someone’s eye before they scroll past.
That’s where it becomes crucial to nail your Black Friday email subject line.
The good news is that a great subject line doesn’t require a marketing degree or fancy copywriting skills. It just needs to be compelling enough to make someone see what’s inside.
It doesn’t matter if you’re running a scrappy startup or managing campaigns for a major brand; the right words can mean the difference between a 50% open rate and your email disappearing forever.
In this article, we’ve rounded up 251 Black Friday subject lines that work, plus some tested tips to help you compose your own winners. Let’s go
Why Black Friday Email Subject Lines Matter?
Black Friday email subject lines matter because they decide whether your message gets opened or lost in a crowded inbox.
According to Mailjet, only about 14% of BFCM got read.
This implies that a vast majority of BFCM emails simply offer no benefits.
The retailers who make a difference on Black Friday aren’t necessarily the ones with the deepest discounts; they’re the ones who nail that first impression and get their emails opened.
If you nail your subject line, you have a much higher chance of getting your email opened (and read).
But what separates a subject line that converts from one that gets ignored? It comes down to a few key traits:
What Makes a Great Black Friday Email Subject Line?
- It ceates urgency and scarcity
Black Friday shoppers are primed to act fast. The whole weekend is built on the idea that these deals won’t last forever. Your subject line should tap into that mindset.
Urgency and scarcity are psychological triggers. When you highlight limited quantities, countdown timers, or approaching deadlines, you’re giving people a legitimate reason to stop scrolling and pay attention.
But the urgency needs to be real. Shoppers can smell fake scarcity from a mile away, and nothing kills trust faster than seeing the same “final hours!” email three days in a row.
Example: “Last Chance! Black Friday Deals End Tonight!”
- Uses customer data to personalize the message
Generic emails feel like spam. Personalized emails feel like someone actually thought about what you might want.
This goes way beyond just dropping someone’s first name into the subject line (though that’s a decent start). For a tangible impact, you have to reference past purchases, browsing behavior, or shopping preferences.
When someone sees an email that feels tailored to their interests, they’re not just more likely to open it, they’re more likely to actually buy something.
Example: “John, Those Sneakers You Loved Are Now 40% Off”
- Provides clarity and value upfront
People are already overwhelmed with options, so if your subject line makes them work to figure out what you’re offering, they’ll just move on to the next email.
The most effective subject lines cut straight to the value proposition. What’s the discount? What’s the benefit? Why should they care? Answer these questions clearly and quickly. Your subscribers shouldn’t need to decode your message or wonder if there’s actually a good deal inside.
Clear doesn’t mean boring, though. It just means respecting your reader’s time and intelligence. They want to know what’s in it for them, and they want to know fast.
Example: “50% Off Everything—Black Friday Mega Sale!”
- Piques curiosity
Sometimes the best way to get someone to embrace curiosity. Strategic mystery can be compelling, as long as you’re not being vague for the sake of it.
Curiosity-driven subject lines work because they create a little gap between what people know and what they want to know. They hint at something exciting, exclusive, or surprising without revealing all the details.
This approach works exceptionally well when you’ve got something genuinely unique to offer: a surprise flash sale, an exclusive product drop, or an unexpectedly good deal that might seem too good to be true.
Example: “You Won’t Believe These Black Friday Deals…”
The Ultimate List of 251 Black Friday Email Subject Lines for Every Imaginable Scenario
As Joanna Wiebe of Copyhackers puts it,
“The #1 thing we continue to find is that opens skyrocket when your subject line is specific to the segmented list you’re sending to.”
That’s a reminder that the words you choose, and who you aim them at, matter far more than most people think.
We also know writing subject lines from scratch can drain hours you don’t really have, especially when you should be focusing on how to lift sales during the holiday rush.
So feel free to borrow from the collection below. You’ll have plenty to work with.
Psst…Get All 251 Subject Lines in One Place
| We know scrolling through this entire article to find the perfect subject line isn’t exactly efficient when you’re racing against Black Friday deadlines. That’s why we’ve packed all 251 subject lines into a free, downloadable Notion doc that you can access anytime. Copy, paste, customize, and organize your favorites without the hassle |
Pre-Black Friday Subject Lines
Pre-Black Friday subject lines are useful when you want to warm up your audience before the main sale hits and start building anticipation early. Use them a few days to two weeks before Black Friday to tease upcoming deals, announce early access, and keep your brand top of mind before inboxes get crowded.
- Early access: Black Friday deals unlock in 24 hours
- Mark your calendar: our biggest sale starts Friday
- Sneak peek: Here’s what’s going on sale for Black Friday
- Get ready: Black Friday preview inside
- Your Black Friday game plan starts here
- We’re dropping our Black Friday deals early (just for you)
- 48 hours until Black Friday. Here’s your head start
- The countdown begins: Black Friday is almost here
- Prep your cart: Black Friday deals coming soon
- VIP early access to Black Friday—before everyone else
- Psst… Black Friday sales start earlier than you think
- Your exclusive Black Friday sneak peek is here
- Friday’s going to be huge. Get the details now
- Early bird gets the deal: Black Friday preview
- Set your alarms: Black Friday starts at midnight
- Here’s what you’ll want to grab on Black Friday
- Your wishlist is about to get a whole lot cheaper
- The wait is almost over. Black Friday preview inside
- Bookmark this: Your Black Friday shopping guide
- Get first dibs on our Black Friday doorbusters
- This Friday: Our biggest discounts of the year
- Black Friday prep: What’s on sale and when
- 3 days until Black Friday: Start planning now
- Insider access: Shop Black Friday deals early
- The Black Friday sale you’ve been waiting for starts soon
Black Friday Day Subject Lines
Black Friday Day subject lines work best when your sale is officially live and shoppers are actively hunting for deals. Use them on the morning of Black Friday and throughout the day. They are meant to highlight your biggest offers, create urgency, and drive immediate clicks while attention is at its peak.
- It’s here! Black Friday deals are LIVE now
- Black Friday is officially ON. Shop now
- Today only: Our biggest sale of the year
- LIVE NOW: Black Friday doorbusters
- Happy Black Friday! Save up to 70% today
- Black Friday: Every single thing is on sale
- The sale everyone’s been waiting for is here
- Today’s the day. Black Friday deals activated
- Black Friday has arrived: Shop the chaos
- RIGHT NOW: Black Friday mega sale live
- It’s Black Friday. Time to treat yourself
- Black Friday doorbusters: Go, go, go!
- Today’s forecast: 100% chance of incredible deals
- Black Friday is here and it’s even better than expected
- Game on: Black Friday deals drop NOW
- This is not a drill. Black Friday has begun
- LIVE: The Black Friday sale that breaks the internet
- Black Friday madness starts right now
- Wake up! Black Friday deals won’t wait
- Today only: Black Friday blowout sale
- It’s finally Black Friday. Let the shopping begin
- Black Friday: The sale we’ve all been waiting for
- Starting NOW: Black Friday deals across the site
- Black Friday has landed. Shop before it’s gone
- The biggest shopping day of the year is HERE
VIP and Exclusive Black Friday Subject Lines
Your customers love being made to feel special, and VIP or exclusive Black Friday subject lines tap into exactly that. Use them a few days before your main sale to offer early access or members-only perks that encourage early purchases.
- VIP access: Shop Black Friday before everyone else
- You’re invited: Exclusive Black Friday early access
- Members only: Your private Black Friday sale
- Special invite: Black Friday VIP shopping hour
- Because you’re a VIP: Extra 20% off Black Friday deals
- Exclusive for you: Black Friday presale is open
- Your VIP pass to Black Friday deals (don’t share this)
- Elite access: Black Friday savings start now for you
- Insiders get first pick. Black Friday VIP access
- You’re on the list: Exclusive Black Friday preview
- VIP treatment: Early Black Friday deals just for you
- Private sale: Black Friday access for valued customers only
- Your exclusive Black Friday invite—expires soon
- Members-only Black Friday: Shop before the rush
- TOP SECRET: VIP Black Friday deals inside
- Special access granted: Your Black Friday head start
- You’ve earned it: Exclusive Black Friday pricing
- Inner circle only: Black Friday VIP deals unlocked
- Private Black Friday event—you’re invited
- VIP alert: Your exclusive Black Friday discount is ready
- Before anyone else: Your Black Friday early access pass
- Loyalty rewards: Extra savings on Black Friday deals
- For our best customers: VIP Black Friday access
- You’re in: Exclusive Black Friday member pricing
- Premium access: Black Friday deals before the crowd
Extended Black Friday Subject Lines
Great for keeping the excitement alive, these subject lines help you reach shoppers who didn’t buy during the main rush. Use them over the weekend or right after Black Friday to highlight extended deals and give customers one more chance to shop.
- EXTENDED: Black Friday deals continue through the weekend
- By popular demand, Black Friday extended another day
- We’re keeping Black Friday going—shop now
- Black Friday isn’t over yet! Extended 48 hours
- Surprise! Black Friday deals extended through Monday
- Extended hours: Black Friday sale still live
- You asked, we listened! Black Friday extended
- BONUS DAY: Black Friday deals continue today
- Black Friday keeps going! shop the extended sale
- Not ready to stop? Black Friday extended!
- The sale continues: Extended Black Friday deals
- Extended! Black Friday savings through Sunday
- We couldn’t stop: Black Friday extended by demand
- Black Friday encore: Extended one more day
- Still shopping? Black Friday deals extended
- Weekend bonus: Black Friday extended through Sunday
- Extended play: Black Friday deals still active
- The party continues! Black Friday extended
- Can’t get enough? Black Friday extended 24 hours
- EXTENDED: Your favorite Black Friday deals are back
- Black Friday rolls on. extended through the weekend
- Keep shopping: Black Friday deals extended
- Extra time: Black Friday sale continues today
- Black Friday overtime: Extended deals inside
- We extended Black Friday just for you
Last Chance Black Friday Subject Lines
Perfect for creating urgency, these subject lines speak to shoppers who are on the fence or running out of time to act. Use them in the final hours of your sale to push quick decisions, and capture those last-minute conversions before the deals expire.
- FINAL HOURS: Black Friday ends at midnight
- Last call for Black Friday deals…going fast
- This is it: Last chance for Black Friday savings
- 6 hours left! Black Friday ends tonight
- FINAL CALL: Black Friday deals expire soon
- Last chance: Black Friday sale ends in hours
- Going, going, gone. Black Friday final hours
- Time’s running out on Black Friday deals
- URGENT: Last chance to save on Black Friday
- Final hours alert: Black Friday ends tonight
- Don’t miss out. Black Friday closing soon
- This is your last chance for Black Friday prices
- ENDING SOON: Black Friday deals won’t last
- Final warning: Black Friday ends at midnight
- Last opportunity for Black Friday savings
- Tick tock: Black Friday ends in 3 hours
- ALMOST OVER: Grab Black Friday deals now
- Final countdown: Black Friday expires tonight
- Last few hours of Black Friday…don’t wait
- This is really it. Black Friday ends soon
- TONIGHT ONLY: Last chance Black Friday deals
- Final stretch: Black Friday sale closing fast
- Hurry! Black Friday deals end in hours
- Your last shot at Black Friday prices
- FINAL NOTICE: Black Friday sale ends tonight
Urgency-Driven Black Friday Subject Lines
Great for those who’ve sold a lot and are running low on stock, these subject lines help you turn scarcity into action. Use them when inventory is thinning or your sale is about to end to push shoppers to act fast before their favorite items are gone.
- Only 3 hours left. These deals won’t wait
- Hurry! Stock disappearing fast on Black Friday
- Act fast: Best sellers selling out now
- URGENT: Your cart items are almost gone
- Selling out quickly. Grab yours before it’s too late
- Time’s almost up; don’t miss these deals
- Flash warning: Items selling faster than expected
- Running out: Restock unlikely on these items
- Move fast! Limited quantities available
- Almost gone: Your favorites are selling out
- Inventory alert: Popular items disappearing now
- Don’t wait—these deals end in hours
- QUICK: Sizes and colors selling out fast
- Hurry! Limited stock on our best Black Friday deals
- Time-sensitive: These won’t last the day
- Act now or regret it later. Stock is low
- Selling like hotcakes. Shop before it’s gone
- Speed matters: Black Friday favorites almost sold out
- Don’t sleep on this. Inventory running low
- RUSH: Your wishlist items are selling out
- Nearly gone: Restock not guaranteed
- Clock’s ticking and so is our inventory
- Vanishing fast. Grab it while you can
- Low stock alert: Black Friday bestsellers disappearing
- Final inventory. Once it’s gone, it’s gone
Discount-Specific Black Friday Subject Lines
Ideal when you want your offer to be instantly clear, these subject lines highlight the exact discount shoppers can expect. Use them during your main sale window to attract deal-focused buyers who are scanning their inbox for the biggest savings.
- 70% off everything. Yes, everything!
- Buy one, get one free. Black Friday only
- 50% off sitewide: No code needed
- Take an extra 30% off already reduced prices
- $50 off orders over $100 today only
- 60% off + free shipping. Black Friday special
- Flash deal: 80% off select styles right now
- Up to 75% off! Our deepest discounts ever
- BOGO 50% off everything in stock
- Save $100 on orders over $250 today
- 40% off your entire purchase—no exceptions
- Triple discount: 50% off + 20% off + free shipping
- Doorbusters: $10, $20, $30—that’s it!
- 55% off + buy 2, get 1 free
- Spend $75, save $25. Black Friday exclusive
- 65% off top sellers; today only
- Half price on everything. Black Friday blowout
- $25 and under; entire store on sale
- Buy 3, get 2 free: Black Friday madness
- 45% off no minimum purchase required
- Double discount: 30% off + 30% off clearance
- $20 off every $50 you spend
- 90% off doorbuster deals…while supplies last
- Free gift with purchase over $100 today
- 35% off everything + free returns
Product-Specific Black Friday Subject Lines
These are subject lines for different kinds of brands/products, making them ideal when you want to highlight specific items rather than your entire sale. Use them to draw attention to bestsellers, new launches, or high-demand products so shoppers know exactly what’s worth grabbing first.
- Black Friday: Designer handbags up to 60% off
- Winter coats under $50. Black Friday only
- Electronics blowout: TVs, laptops, and more
- Skincare sets: Buy 2, get 1 free today
- Athletic shoes starting at $29. Black Friday steals
- Kitchen appliances: Save up to 70% today
- Jewelry deals: Everything under $100
- Home décor madness. 50% off rugs, furniture, art
- Tech deals: AirPods, tablets, and smartwatches on sale
- Beauty bonanza: Makeup and skincare 40% off
- Sneaker drop: Limited edition styles on sale now
- Furniture clearance: Sofas, beds, and dining sets
- Toy extravaganza: Top brands up to 60% off
- Denim for days. Jeans starting at $19
- Watch sale: Luxury styles up to 50% off
- Gaming deals: Consoles, controllers, and games
- Sweater weather sale. Cozy styles under $30
- Fitness equipment: Weights, bikes, and yoga gear
- Book lovers’ paradise. Bestsellers 40% off
- Coffee makers and espresso machines on sale
- Boot bonanza: Ankle boots, knee-highs, and more
- Holiday décor: Trees, lights, and ornaments 50% off
- Bedding blowout: Sheets, comforters, and pillows
- Phone accessories: Cases, chargers, and earbuds
- Fragrance frenzy: Premium perfumes 35% off
Post-Black Friday Subject Lines
The Black Friday rush is finally over, and these subject lines help you reconnect with shoppers who didn’t jump in during the main event. Use them right after Black Friday to highlight remaining deals, share bestsellers, or point people toward what’s coming next, especially Cyber Monday.
- Missed Black Friday? We’ve got you covered
- Black Friday may be over, but the deals aren’t
- Still want in? Post-Black Friday deals continue
- We saved some Black Friday deals just for you
- Round 2: Post-Black Friday savings start now
- Didn’t shop Black Friday? Here’s your second chance
- The sale after the sale. Still amazing deals
- Post-Black Friday bonus: Extra discounts added
- Black Friday hangover cure: More deals inside
- Surprise! Black Friday prices extended for you
- Cyber Monday preview: Black Friday deals continue
- Missed out? Post-Black Friday flash sale live now
- Black Friday aftermath: Deals still available
- We’re not done yet. Post-Black Friday savings
- Second chance savings: Black Friday deals back
Experimental Black Friday Subject Lines
Want to do something different? These subject lines help you break the usual Black Friday patterns with unexpected wording or fresh angles that instantly catch the eye. Use them when you want to spark curiosity and stand out in a crowded inbox.
- Is this the strangest Black Friday deal you’ve ever seen?
- We tried something weird this year… open at your own risk
- Our prices glitched. We’re rolling with it
- The sale that shouldn’t exist (but does)
- This email self-destructs in 3… 2… 1…
- Black Friday, but make it chaotic
- We broke the “rules” of discounts — want to see?
- Your algorithm definitely didn’t predict this
- An unhinged idea became a Black Friday deal
- We asked AI to run our sale… here’s what happened
Free Shipping and Gift Black Friday Subject Lines
Nothing motivates a click quite like getting something extra, and these subject lines tap into that instinct. Use them when you’re offering free shipping or add-ons that make your Black Friday deal feel even sweeter without lowering the price.
- Free shipping on everything. Black Friday only
- Black Friday + free 2-day shipping = happiness
- No shipping fees today. Black Friday treat
- Free shipping, no minimum: happy Black Friday
- Black Friday bonus: Free express shipping
- Ship it free: Black Friday special offer
- Free delivery on all Black Friday orders
- Shipping’s on us this Black Friday
- Zero shipping charges. Black Friday gift to you
- Free shipping + Black Friday deals = perfect combo
- Black Friday: Order now, shipping is free
- Complimentary shipping on every Black Friday order
- Free gift with every purchase. Black Friday exclusive
- Spend $50, get a free gift. Black Friday bonus
- Free surprise gift inside every Black Friday order
Curiosity-Driven Black Friday Subject Lines
Finally, some curiosity-driven Black Friday Subject Lines. These are perfect to spark intrigue and make shoppers open just to see what’s inside. Overloaded with mystery, hints, or unexpected phrasing, they pull people in without giving the full story away.
- We’re not supposed to reveal this yet
- Something big unlocks at midnight 👀
- Open this before your friends do
- Black Friday… but with a twist
- We’ve been saving this surprise for you
- Guess what just got marked down?
- You’ll want to see what’s inside
- We weren’t planning to drop this early
- This deal is making our staff panic (in a good way)
- One hint: your wishlist is about to shrink
- The offer everyone keeps asking us about is finally here
Expert Tips to Craft Winning Black Friday Subject Lines
Say you need some niche or personalized subject lines. Before you start, we’d like you to remember some golden rules for subject lines that hit the mark every time
Keep it short and scannable
Most people check email on their phones, which means you’ve got about 30-40 characters before your subject line gets cut off.
Get to the point fast. Write “50% off ends tonight” instead of “We’re offering an incredible discount opportunity for our valued customers.”
Create genuine urgency (without being annoying)
Time-sensitive language works because FOMO is real. But there’s a difference between “24 hours left!” and “LAST CHANCE FINAL WARNING!!!” One creates urgency; the other feels like being yelled at by an overeager salesperson.
Use numbers to your advantage
Our brains love specifics. “Save big” is vague and forgettable. “Save $47 on every order” or “70% off sitewide” gives people concrete information they can latch onto.
Personalization goes a long way
Adding someone’s name is nice, but real personalization goes deeper. Reference their past purchases, browsing history, or location. “Sarah, those boots you loved are now 40%” beats a generic blast any day.
Lead with the benefit, not your brand
Unless you’re Apple, people care more about what they’re getting than who’s sending the email. “Free shipping + 60% off” will outperform “The Annual Thanksgiving Weekend Sale Event” every single time.
Be specific about your offer
Vague promises like “amazing deals inside” are not exactly helpful. Tell people what they’re getting: “Buy 2, get 1 free on all hoodies” or “$25 gift cards for every $100 spent.”
How to Create Black Friday Subject Lines with AI
There’s still a problem…coming up with fresh, compelling subject lines for every Black Friday campaign can (and will) drain your creative energy.
Thankfully, we live in the age of AI.
AI tools, like ChatGPT and Claude, can help you generate dozens of subject line variations in seconds, test different angles you might not have considered, and even predict which lines are most likely to get opened. But…AI is only as good as what you feed it.
Getting Started with AI Subject Line Generation
The best AI-generated subject lines come from specific, detailed prompts. Instead of asking AI to “write Black Friday subject lines,” give it context. Tell it about your brand voice, your target audience, your specific offers, and what’s worked in the past.
For example: “Generate 20 Black Friday subject lines for a sustainable fashion brand targeting eco-conscious millennials. We’re offering 40% off and free shipping. Our brand voice is warm, authentic, and never pushy. Previous high-performing subject lines included personal touches and emphasized value over urgency.”
Here’s what you’ll get with this prompt:
See the difference? You’re giving AI the information it needs to generate ideas that fit your brand.
Here are some more prompt templates for you to customize and use
- Generate [number] Black Friday email subject lines for a [type of business] that sells [products/services]. Our target audience is [demographic details]. Our brand voice is [adjectives describing tone—playful, sophisticated, edgy, warm, etc.]. We’re offering [specific discount/offer]. Keep subject lines under [character count]
- I have this Black Friday subject line: ‘[your existing subject line]’. Generate 10 variations that maintain the same core message but experiment with different angles: [adding personalization, creating more urgency, making it more playful, emphasizing value, asking a question, etc.].
- Analyze these successful Black Friday subject lines from similar brands: [list 3-5 examples]. Now generate [number] subject lines for my brand that capture similar effectiveness but with a unique angle. My offer is [deal details]. My brand differentiator is [what makes you unique].
How to Use AI Effectively (Without sounding like a robot)
The quality of your AI-generated subject lines depends heavily on your prompts. Here are some strategies that work:
- Be specific about constraints: “Create 15 subject lines under 40 characters that emphasize urgency without using the words ‘hurry’ or ‘rush.'”
- Reference your data: “Our audience responds well to questions and personalization. Generate subject lines that incorporate these elements with Black Friday savings messaging.”
- Request variations on a theme: “Take this subject line—’50% Off Everything Today’—and create 10 variations that maintain the same offer but vary the tone from playful to urgent to exclusive.”
- Ask for different emotional angles: “Generate subject lines that emphasize: excitement, FOMO, exclusivity, gratitude, and curiosity, 5 for each emotion.”
Finally, let AI generate the variations you wouldn’t have thought of, then apply your human judgment to select and refine the winners.
SmartrMail Helps You Nail Black Friday Email Campaigns
Once you’ve sorted through your Black Friday subject lines and picked a few strong contenders, the next step is sending them in a way that actually maximizes opens and sales.
That’s where SmartrMail comes in. It’s built for quick, high-impact e-commerce campaigns, which makes it a comfortable fit for the chaos of Black Friday.
The editor is easy to work with, the store data syncs cleanly, and the automation tools save you from hovering over every single send.
With Smartrmail, you get
- A/B testing right inside the campaign builder so you can trial two subject lines and let SmartrMail automatically send the winner to the rest of your list.
- Personalization options that pull in names, past purchases, browsing history and other customer details to make your subject lines feel relevant.
- Segmentation tools for targeting VIPs, recent buyers, high-intent visitors, or abandoned-cart shoppers with tailored subject lines
Together, A/B testing, segmentation, and automated flows provide a steady and reliable way to boost opens and keep your Black Friday weekend running smoothly.
Get started with Smartrmail now.
FAQs
- Why are Black Friday email subject lines important?
Black Friday inboxes are absolute chaos, and your subject line is what decides whether someone opens your email or scrolls right past it. A great subject line grabs attention, sparks curiosity, and gives people a reason to click, which is exactly what you need when everyone’s competing for the same eyeballs.
- How long should my Black Friday email subject lines be?
Aim for 30-50 characters if you can. This sweet spot ensures your subject line doesn’t get cut off on mobile devices (where most people check email).
- What are some effective strategies for creating urgency in Black Friday subject lines?
Tap into FOMO with phrases like “Last Chance,” “Ends Soon,” or “Final Hours.” When people know a deal won’t last forever, they’re way more likely to act fast. Just make sure the urgency is real; nobody likes fake countdown timers.
- How can I make my Black Friday email subject lines stand out?
Get creative! Use words that feel exclusive, throw in a well-placed emoji for visual pop, and lead with your best offer. Personalization helps too; when someone sees a deal personalized to what they want, they’re much more likely to open that email.
- What are some actionable words to use in Black Friday subject lines?
Power verbs like “Shop,” “Save,” “Unlock,” “Claim,” and “Discover” give people a clear next step. They transform your subject line from an announcement into an invitation to do something exciting.
- How important is A/B testing for Black Friday email subject lines?
Super important! Testing different subject lines shows you what actually resonates with your audience—not just what you think will work. Even small tweaks can make a huge difference in open rates, so it’s worth experimenting.
