Reasons why an email address may bounce
Issue/Question
Is there a reason an email address is bouncing?
Resolution
There are many reasons an email address may appear on the Email Bounce Listing Report.
This report can be found under Reports > Find Reports > search for Email Bounce Listing. The Current Status Column will list the bounce reason.
Status Definitions
| Bounced | Undeliverable; possible reasons could be an invalid domain or user, or that the user's mailbox is full or not accepting emails |
| DNS Problem | Unable to find the domain for the email address |
| Rejected | Rejected by the email service because the address was previously undeliverable |
| Undetermined | The response text could not be identified |
| Invalid Recipient | The recipient is an invalid email address or the error could not be determined |
| Soft Bounce | The message soft bounced |
| DNS Failure | The message bounced due to a DNS failure |
| Mailbox Full | The message bounced due to the remote mailbox being over quota |
| Too Large | The message bounced because it was too large for the recipient |
| Timeout | The message timed out |
| Admin Failure | The message was failed by SparkPost's configured policies |
| Generic Bounce: No RCPT | No recipient could be determined for the message |
| Generic Bounce | The message failed for unspecified reasons |
| Mail Block | The message was blocked by the receiver |
| Spam Block | The message was blocked by the receiver as coming from a known spam source |
| Spam Content | The message was blocked by the receiver as spam |
| Prohibited Attachment | The message was blocked by the receiver because it contained a prohibited attachment |
| Relaying Denied | The message was blocked by the receiver because relaying is not allowed |
| Auto-Reply | The message is an auto-reply/vacation email |
| Transient Failure | Message transmission has been temporarily delayed |
| Subscribe | The message is a subscribe request |
| Unsubscribe | The message is an unsubscribe request |
| Challenge-Response | The message is a challenge-response probe |