Email rejections occur when your message fails to reach the recipient's inbox. There are several reasons for this, including:
Bounce Rates: When an email cannot be delivered, it results in a bounce. There are two types: hard bounces, which occur due to invalid addresses, and soft bounces, which are temporary issues like a full inbox. Spam Filters: Emails may be flagged as spam due to certain keywords, suspicious links, or a high frequency of sending. Blacklisting: If your IP address is blacklisted, your emails will be rejected by email providers like Gmail or Yahoo. DMARC, DKIM, and SPF Failures: These are email authentication protocols that, when improperly set up, can lead to delivery failures.