Unspam is an email preview tool that renders your real email across 50+ email clients and devices, from Gmail and Outlook to Apple Mail, iPhone, Android, and dark mode, so you catch a broken layout before your subscribers do. Every test returns a pixel-accurate email preview of exactly what each inbox shows, in light and dark, with no screenshots to take and no test devices to buy.
One manual test renders your message everywhere your subscribers read it.
Every test renders an email preview across 50+ real email clients and devices: desktop apps, webmail, and phones, each in light and dark. That includes Gmail, Outlook 2007 through 2019, Outlook.com, Office 365, Apple Mail, iCloud, Yahoo, AOL, GMX, Zoho, Thunderbird, eM Client, and Mailbird, plus iPhone, iPad, and Android. A selection of what you get:
Gmail
Outlook
Office 365
Apple Mail
iCloud
Yahoo Mail
AOL
GMX
Zoho Mail
Thunderbird
eM Client
Mailbird
Windows 10 Mail
iPhone iPad
AndroidEvery client renders HTML its own way. Outlook still leans on the Word engine, Gmail strips styles it does not like, Apple Mail honors almost everything. A layout that looks perfect where you built it can fall apart in the client half your list actually opens.
Most readers now open mail in dark mode, where clients invert colors, repaint backgrounds, and can turn a dark logo invisible on a dark panel. You never catch it unless you look at the dark variant of each client.
Checking by hand means a drawer of phones and a stack of email accounts, and you still miss Outlook 2016, older Android builds, and the regional webmail your international readers use. Most teams just send and hope for the best.
See your email exactly as Gmail, Outlook, Apple Mail, Yahoo, and dozens more display it, in both light and dark. Switch clients from one result, with no test accounts to manage and no screenshots to stitch together.
The same render feeds the AI eye-tracking heatmap, so in one result you can confirm the layout holds up and that the eye lands on your offer, across desktop, tablet, and mobile. Warm zones mark where the eye lands first and cool zones what gets skipped, so you can move your headline and CTA to where readers already look.
Previews arrive inside the same result as your spam score, authentication checks, and per-provider placement. No separate upload, no second subscription, no context switch.
Each preview is your email opened in an actual copy of the client and device, so what you see is what your subscriber sees, dark mode included.
Every plan returns client previews with each test, the free tier included, so you can see how your email renders without adding a card.
Add the Unspam seed address to your campaign and send the exact message you plan to ship. There is no ESP to connect and no HTML to upload.
Unspam opens your email in 50+ real clients and devices and captures exactly what each one shows, in both light and dark.
Pick any client from the dropdown to see a pixel-accurate preview. Spot the broken column, the invisible dark-mode logo, or the CTA that gets cut off.
Adjust the HTML, send the new version back, and confirm it holds together across every client before the campaign reaches a subscriber.
The moments teams pull up client previews before a send. Because previews sit next to the spam score, you check rendering and deliverability in the same pass.
Before a campaign goes out, walk the preview across Gmail, Outlook, and Apple Mail to confirm the layout, images, and links hold up everywhere your list reads.
Open the dark-mode email preview next to the light one to catch inverted colors, a logo that vanishes on a dark background, or text that drops below readable contrast, before your subscribers see it.
Test a master template once across every client so the structure is sound, then reuse it knowing it renders cleanly on desktop, webmail, and mobile.
When a design breaks only in Outlook, compare the 2016, 2019, and Office 365 renders side by side to find exactly where the Word engine trips.
Confirm a weekly newsletter reads well from a wide desktop screen down to an iPhone SE, where columns stack and the preheader takes the first line.
Open the same email preview with images blocked to see the alt text your reader gets by default, confirm the preheader takes the first line, and make sure the message still reads before a single image loads.
Receipts, password resets, and order confirmations render across just as many clients as a campaign does. Preview the emails your product sends automatically so a broken table or a missing button never reaches a customer mid-flow.
Agencies can show a client precisely how their email will look in every major inbox before approval, instead of promising it will be fine.
What client previews cover, how they fit the rest of a test, and where they help before a send.
Every test renders your email across 50+ real clients and devices, including Gmail, Outlook (2007 through 2019, plus Outlook.com and Office 365), Apple Mail, iCloud, Yahoo, AOL, GMX, and Zoho, alongside mobile devices like the iPhone, iPad, and Android. Desktop apps, webmail, and phones are all covered, each in light and dark. See the pricing page for how many tests each plan includes.
No. Unspam renders each preview on its own copy of the client and device, so you do not need a drawer of phones or a pile of email logins. You send one real email and get every client back in the same result.
Yes. Clients that support dark mode are rendered in both light and dark, so you can catch the classic failures: inverted colors, a dark logo that disappears on a dark panel, and text that loses contrast. Dark mode is where a lot of otherwise clean emails break.
Client previews are part of the standard Unspam result, not a separate product. When you run a spam and placement test, the previews come back next to your spam score, authentication breakdown, and per-provider placement, so you fix how the email looks and whether it reaches the inbox in one pass. There is nothing extra to install and no ESP to connect.
Yes, and it is included on every plan, the free tier included. Each test returns the client previews, the spam score, authentication checks, and the attention heatmap together, with a monthly test quota and no card required to start.
Add the Unspam seed address to your campaign and send the real message to it, the same way you send to any subscriber. Unspam never connects to your sending platform, so you always preview the exact email your audience receives. The renders come back in about a minute.
Yes. Every email preview includes real mobile devices, not just desktop, so you see how the layout reflows on the iPhone, iPad, and Android. Columns stack, tap targets grow, and the preheader takes the first line, exactly as your reader gets it. Pair it with the attention heatmap to confirm the eye still lands on your offer on a small screen.
Each preview is your email opened in an actual copy of the client and device, not a mockup or a simulated render, so what you see is what your subscriber sees, dark mode included. Because the previews arrive next to your deliverability and spam results, you confirm how the email looks and whether it reaches the inbox in one pass.
Outlook is the client most likely to break an HTML email because it still leans on the Word rendering engine. Unspam renders Outlook 2007 through 2019 plus Outlook.com and Office 365, so you can compare the versions side by side and find exactly where a design trips. Run it as part of an inbox placement test to catch rendering and deliverability issues together.
Email client testing, also called email rendering testing, means checking how your email displays across the different apps and devices your subscribers use, since each one renders HTML its own way. That is exactly what this does: every email preview is a rendering test across 50+ real clients and devices, in light and dark, so you catch a layout that breaks in Outlook or a dark-mode logo that vanishes before you send. Run it next to a spam and placement test to cover rendering and deliverability in one pass.
Send one real email to Unspam and get pixel-accurate previews across 50+ clients, plus the spam score and per-provider placement, back in about a minute. No card, no signup.
