Email is a critical communication tool in the digital economy. In e-commerce, it helps ensure shipping notifications and order confirmations trigger correctly after purchases. In software and apps, it is central to the user sign-up and login process, maintaining brand credibility and ensuring users have a seamless experience. However, a single erroneous typo or broken link in an email can damage the reputation of an entire campaign. Email testers help marketers ensure that emails are error-free before sending them to their subscribers.

Essentially, email testers are software programs that walk marketers through an automated pre-send checklist. They can verify email deliverability, confirm links and attachments are functioning properly, and validate HTML and CSS rendering across different browsers and devices. They can also assess email list hygiene through email address validation, and monitor the health of email accounts to maintain a healthy sender reputation.

Testing Email Delivery: Email Testers

Email testing can be an extensive task, but it’s vital for ensuring a consistent delivery of email to your subscribers. Using email testers can help you avoid common mistakes, including subject line errors, typos in the body of the email, and invalid hyperlinks. They can also evaluate the overall email design, including layout, color contrast and image placement, for accessibility (e.g., whether text is legible, and all images contain alt text and focus states).

Many ESPs have built-in tools that offer a quick email preview before sending. Other standalone tools, like PutsMail, allow you to input HTML and test your email against popular client software and browsers.