Bounced emails are emails that are returned to the sender because they could not be delivered to the recipient. There can be a variety of reasons for an email to bounce. These reasons are usually classified into two main categories:
Hard Bounces: These are permanent delivery failures. The most common reasons for hard bounces are:
- The recipient email address does not exist.
- The domain name does not exist.
- The recipient email server has blocked the delivery.
Soft Bounces: These are temporary delivery failures. Some reasons for soft bounces include:
- The recipient’s mailbox is full.
- The email server is temporarily unavailable.
- The email message is too large.
- There are server time-outs or network issues.
- The recipient’s server identified the email as spam.
It’s essential for email marketers and others sending mass emails to monitor bounce rates and addresses that generate bounces. Excessive bounces can hurt the sender’s email reputation, possibly leading to their emails being blocked or sent to the spam folder more frequently. Regularly cleaning and updating the email list to remove addresses that cause hard bounces can help improve delivery rates and the effectiveness of email campaigns.