Test across devices
Test email rendering across supported mobile, desktop, webmail, and native-app contexts. Find layout, image, spacing, and CTA visibility issues before launch.
Preview emails in Outlook before customers see broken layouts
MailSlurp helps teams test HTML email rendering for Outlook.com, Outlook Classic, Outlook New, Gmail, Yahoo, iPhone, and Android so template issues are caught before launch.
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Outlook previews across desktop, web, and mobile versions
MailSlurp preview runs can include Outlook.com, Outlook Classic, New Outlook, Outlook iOS, Outlook Android, and comparison clients so one template can be reviewed across the places customers open mail.
- Outlook.com
- Outlook Classic
- New Outlook
- Outlook iOS
- Outlook Android
- Gmail
- Yahoo
- Apple Mail
Client and device previews
Preview delivered emails before customers see them
Review the campaign across supported email clients and configured render targets, compare results, and inspect the source HTML before the campaign reaches customers.
Check on every client
Fix issues fast
Use configured target sets to compare important client contexts, catch contrast and spacing regressions, and review the same email your app or ESP produced.
Apple Mail
iPadOS Mail
Outlook iOS
Gmail Android
Outlook Android
Outlook Classic
New Outlook
Gmail Web
Outlook Web
Preview Outlook emails before customers receive them
Use MailSlurp to review real client previews, compare rendering differences, and keep evidence with each launch or release.
Check Outlook-specific rendering issues
Review how HTML, tables, buttons, images, spacing, and responsive sections behave in Outlook clients before customers receive the email.
Compare Outlook with mobile and webmail clients
Validate the same message across Gmail, Yahoo, iPhone, Android, and Outlook targets so client-specific defects are easier to isolate.
Use previews in release and campaign checks
Make Outlook rendering part of the same approval path as link checks, image checks, and inbox placement testing.
See campaign QATrigger render checks from your app or tests
Use MailSlurp APIs and dashboards to create preview runs for imported emails, template changes, and automated test flows.
Read render API docs