- Help & API
Last Updated: Feb 02, 2017 04:14PM EST
Below that, you will see 4 categories:
- Targeted: number of emails you sent to SparkPost
- Accepted: number of emails that was accepted by the recipient server (250ok)
- Bounces: emails that were rejected from the recipient server
- Bounce Rate: the percentage of bounces for the particular date range selected. Again, you can also select domain, campaign or template.
When a recipient email server rejects or bounces an email, they will provide us with reasons that we parse and further classify in to one of five sub-categories:
Blocked – These emails were refused because the recipient server determined that the content is spammy, the IP has poor reputation, or a myriad of other filter verdicts. These are rejected at the recipient server level, and never reach the intended recipient.
Hard – Bounces which are rejected as being determined invalid. There either was a typo in the email address (email@example.com), the email doesn’t exist, or it no longer exists.
Admin - These emails were blocked by SparkPost due to a previous unsubscribe, spam/feedback loop complaint or hard bounce. Admin Failures are a result of SparkPost monitoring and protecting your sending reputation. We encourage you to remove recipients who have resulted in a negative signal, but we will systematically disallow any subsequent mailings to these addresses.
Soft – Emails that have been temporarily bounced due to various reasons, generally on the recipient server side. These are safe to resend.
Undetermined – In rare cases, the failure code provided from the recipient server is either unparsable or so generic that we cannot determine the exact cause for the failure.
There are 2 different Types of bounces, In-Band and Out-of-Band:
- In-Band – The recipient server has rejected the email immediately. This signal is received during the message transmission. This is also known in the industry as 'in-protocol'. In-Band bounces make up the majority of all bounce types
- Out-of-Band – Some recipient servers will initially accept the emails, then determine at a downstream process to rejected it. In this case, you may not get a report of the bounces right away. You will receive a delivered event AND a bounce event.
Further down the page, you will see more detail on the various types of bounces your sends have encountered. This chart can be downloaded for further evaluation.