Keeping your email lists healthy and up-to-date requires the removal of invalid email addresses. These contacts often contain typos, cannot receive incoming emails, and have a high probability of ...

Email validation is crucial for verifying the legitimacy and precision of email addresses. It eradicates erroneous or inactive addresses from your list, ensuring only authentic and engaged recipients.

These are usually not returned if an email address does not exist at all. Return codes starting with 5 – i.e. codes between 500 and 599, are reserved for permanent errors, which imply that the email ...