Email audit tool
Check spelling, HTML, links, images and client compatibility together.
Open toolPaste your email to check it
Add HTML, plain text or both. HTML lets the checker inspect links, images and markup as well as the message itself.
What the campaign probe checks
Paste the exported HTML from your email editor to check links, images, markup, and detected email-client compatibility issues together. Plain text is useful for an early content check; HTML gives the probe more to inspect.
Fix the reported problems in your email editor, then paste the revised version to check it again. Open the main links yourself too: a page can load successfully and still be the wrong offer or destination. Check any tracking parameters while you're there.
Check the delivered email too
Once you've checked the draft, see how it looks when it arrives. Use the light and dark mode preview to compare your CSS color rules in a browser, then use MailSlurp device previews to review the delivered email in supported clients. Run an inbox placement test separately to check where a sent message lands.
For recurring checks, use Campaign Probe to keep dedicated probe addresses and run history. The campaign testing checklist brings content, rendering, authentication, and placement checks into one review.
Related tools
FAQ
What is a campaign probe?
It checks the email content you paste for broken links, missing images, HTML problems and possible client-compatibility issues. Use the results to fix your draft, then check the delivered email too.
Should I paste HTML or plain text?
Paste HTML if you have it: the checker can inspect your links, images and markup together. Plain text works too if you're still writing the message or don't have the final HTML yet.
Does this save run history?
Each public check returns a result for the content you paste. Use Campaign Probe in your MailSlurp account to keep run history and compare recurring checks.
When should I run a check?
Run it when a draft is ready, and again after edits to the links, images or template. It's useful for newsletters, promotions, welcome emails and transactional messages. Keep the manual checks that need your judgment, such as whether a button opens the right offer.