Email deliverability tester help marketers navigate the complex landscape of spam filters and email service provider algorithms. They also enable marketers to optimize key aspects of email delivery in order to avoid being flagged as spam and consistently reach recipients’ inboxes.

A variety of factors impact email deliverability, including sender reputation, content, list quality, authentication status, and more. Poor list hygiene, for example, can hurt a brand’s sender reputation and lead to high bounce rates and spam complaints. Likewise, using “spam trigger” words or implementing non-compliant email marketing practices can negatively affect deliverability.

Free Online Email Checker: Verify Email Addresses Quickly

As a result, it’s important to test email deliverability before sending out large volumes of campaigns or newsletters that could be mistaken for spam by some recipients. There are several ways to do this, including using email pre-deployment tools like Email on Acid and Mailgun Optimize, and seed list testing with services like SendForensics.

Email on Acid’s free pre-deployment tool analyzes the sender, recipient, and content of an email to determine its likelihood of being marked as spam. It also assesses the content’s structure, subject line, and attachments. It also checks whether a sender’s IP address is listed on any of the major block lists. Its premium version, SendForensics, is more comprehensive and offers detailed reports based on a variety of criteria. For instance, it takes into account the sender’s IP reputation, DNS records, and SPF and DMARC authentication protocols. It also provides a snapshot of current inbox placement across various mail providers.