BLOG - Effective Email Ad Formats for Publishers: How to Place Ads in Email Newsletters
Email is still the most controlled and profitable channel a publisher owns. Every send lands directly in a subscriber’s inbox, without algorithms deciding who sees it. For publishers running newsletters at scale, the right ads in email can turn that attention into steady, predictable revenue.
This guide walks through the main formats of ads in email, how each works, where they perform best, and how to match them to your audience and revenue goals. You’ll see how native ads in email newsletters, dedicated sends, banners, and other formats can drive monetization without eroding reader trust.
What Are Ads in Email?
An email ad is a paid placement inside a newsletter or a standalone email campaign. It can be text-based, visual, or a mix, designed to fit the publisher’s format and reach subscribers directly in their inbox.
For publishers, ads in email are a way to monetise an existing audience without diluting the content they signed up for. Because the message is delivered in a trusted environment, engagement rates are often higher than on third-party channels.
Revenue can come from:
- Single placements sold directly to advertisers
- Packaged sponsorships
- Programmatic delivery that serves targeted creative in real time
Can you put ads in an email? Absolutely! With the right format, placement, and technology. The next section breaks down the main email ad formats you can use to grow revenue while keeping reader trust.
Main Types of Ads in Email Newsletters
There’s more than one way to run ads in an email. Some formats blend seamlessly with editorial. Others give the advertiser the full spotlight for a single send. Each format changes how the ad is experienced, how it performs, and how you price it.
Native Ads in Email Newsletters
Native ads in email newsletters are sponsored blocks that mirror your editorial layout and tone, clearly labeled but integrated into the flow. This email format for advertisement uses your voice and the trust you’ve built, so the message feels relevant rather than intrusive.
They can be:
- Text-only
- Image-plus-copy
- Compact panels matching your typography, spacing, and grid
Common placements are listed next.
Hero or Header Sponsorship
The first sponsored block after the header. It gets the fastest attention and suits launches, limited-time offers, and brand campaigns.
Use:
- Tight headline
- Short value statement
- One strong image
- A single primary CTA
This premium placement typically commands higher CPMs and delivers decisive click-through because it’s seen before any scroll.
Mid-Newsletter Sponsorship
Placed between editorial sections while readers are actively engaged. Blends naturally with content and allows slightly longer copy with a clear CTA above the fold. Ideal for consideration campaigns, demos, event signups, and lead forms.
Footer or Snippet Sponsorship
A compact line or two near the end, often text-only with a link. Visibility is lower, but intent can be high among readers who reach the footer. Works for direct, transactional offers: discounts, quick signups, or “read next” prompts.
Dedicated Email Sends (Solo Ads)
A dedicated email send, or solo ad, is a full email devoted to one advertiser’s message. Instead of sharing space with other content, the advertiser gets the entire send: subject line, header, body copy, images, and call-to-action all driving one offer.
Why they work:
- No competing messages
- Every element supports the same conversion goal
- Higher ROI than shared placements
They’re especially effective for:
- Product launches
- Limited-time discounts
- Ticket sales
- Event registrations
Example: a publisher targets a dedicated email ad campaign toward a segmented list of readers who’ve engaged with similar topics before. The targeting ensures relevance, while the single-focus format maximises the chance of a click and conversion.
Banner Ads in Email
Banner ads are image-based placements that stand out from surrounding content. They can appear at the top, within, or at the bottom of a newsletter, defined by fixed dimensions.
Common email ad sizes include:
- 300×250 – medium rectangle
- 728×90 – leaderboard
- 160×600 – skyscraper
- Pros: Strong visual impact, ideal for brand awareness and broad reach.
- Cons: Often lower CTR than native formats, especially if they feel like traditional display ads.
They work best when designed to match the newsletter’s style and when the message is instantly clear without relying on heavy text.
Video Ads in Email
A video ad in email uses motion to grab attention fast. Since true video playback isn’t supported everywhere, publishers often simulate it with:
- GIF loops
- Static thumbnails overlaid with a play button linking to a landing page or hosted video
Best practices:
- Keep file sizes under 200-300 Kb for fast load
- Test across major email clients
- Include a fallback image so the ad still works if motion is blocked
Example: a short looping animation showing a product in action, paired with a headline and CTA leading to a full demo video.
Match Email Ad Formats to Audience and Goals
The best email ad for your newsletter depends on:
- How your content is structured
- How your readers engage
- What you want the ad to achieve
A short, high-frequency newsletter might perform best with a single native placement, while a long-form weekly can support multiple sponsors without overwhelming the reader.
Trust drives results. An ad that feels out of place will damage it, regardless of CPM. Match the tone, pacing, and style of your editorial. Keep file sizes light, and choose an email ad size that fits your template without forcing design changes.
Use data to refine decisions:
- A/B test ad placement, headline, and CTA copy
- Track click-through and post-click actions
- Iterate based on what leads to meaningful results
How to Create an Email Ad That Converts
Creating an email ad that delivers clicks and revenue starts with relevance. Every element, from headline to CTA, must connect with the reader’s interests and stand out in the scroll. Strong email ad copy is concise, specific, and paired with visuals or formatting that make the offer clear in seconds.
Step 1: Write Compelling Email Ad Copy
- Make the offer clear, relevant, and time-sensitive
- Match the tone of your newsletter
- Avoid over-designed or vague language. Plain and direct works.
Step 2: Optimise CTA Placement and Design
- Use action-oriented language: “Start Your Free Trial,” “Book Your Seat,” “Get the Report”
- Test button vs. text link formats
- Position CTAs where they’re visible without scrolling
- Make them visually distinct from surrounding content
Step 3: Personalise with Data
- Segment readers by past clicks, purchases, or topic interest
- Serve offers that align with those behaviours
- Example: finance-engaged readers see a webinar or tool in their version of the newsletter
Keep Email Ad Campaigns Performing
An email ad campaign needs active oversight.
Monitor:
- Click-through rate for engagement
- Conversions for revenue
- Unsubscribe rate for signs of ad fatigue
Refresh creative before it goes stale: rotate headlines, images, and offers.
Keep your subscriber list healthy:
- Run win-back campaigns with a clear, relevant offer
- Remove truly inactive addresses to protect deliverability
Examples of Effective In-Email Ads
Passendo’s Emperor platform supports multiple ad formats so publishers can sell and deliver campaigns without disrupting workflow. Here are email ads examples that show how each format works in practice.
Hero Sponsorship (Native)
A large placement right under the newsletter header. Combines headline, short body text, brand logo, and image, styled to match the template. Example: travel brand promoting a seasonal package with a hero image, bold headline, and “Book Now” CTA.
Mid-Newsletter Native Placement
Appears between editorial sections, styled identically to content but marked as sponsored. Emperor allows segment-specific creative. Example: software sponsor offering a free tool download to readers engaged with past tech content.
Dedicated Email Send
Full creative takeover for one advertiser, including subject line and multiple CTAs. Example: event organiser sends to past attendees with agenda highlights, speaker images, and “Register Now” CTAs.
Banner Placement
Fixed-size image slot (e.g., 300×250 or 728×90) in header, footer, or between content blocks. Example: a fashion retailer runs a seasonal sale banner with product images and a discount code.
Driving More Revenue with the Right Ads in Email
Well-placed ads in email newsletters can become one of a publisher’s most reliable and scalable revenue streams. The key is aligning the format with your audience and keeping the integration seamless. High-impact hero placements, segmented dedicated sends, or simple banners, when used well, can deliver both engagement and long-term advertiser relationships.
Passendo’s platform is built to help you sell, deliver, and optimise these formats at scale. From campaign management to precision targeting, it makes monetisation easier without adding operational complexity.
Ready to increase revenue from your newsletter inventory?
Connect with Passendo to explore the Emperor platform or join our partner network.
FAQ on Ads in Email
What is an email ad?
A paid placement inside a newsletter or standalone email, promoting a product, service, or brand.
What are ads in email?
Any advertising delivered within an email, including native placements, banners, video, or dedicated sends.
What is solo ads in email marketing?
A full email devoted to one advertiser’s message, sent to a publisher’s list without other content or sponsors.
How to run email marketing ads?
Select the format, create targeted copy and visuals, place the ad in your newsletter or as a dedicated send, and track performance to refine results.
Can you put ads in an email?
Yes! With the right format, placement, and technology, ads can be added without harming deliverability or reader trust.