Rejected rate means the message was not accepted (blocked) due to reputation drivers such as end user complaints, spam trap hits and unknown user rates. Applying best practice recommendations listed for those drivers will help decrease the rejected rate. Content and authentication may play a role as well.
Everest seeds will appear as "missing" in Inbox Placement results if the seeds are blocked at a particular mailbox provider. It's possible that only a portion of your email is blocked at a mailbox provider depending on when the block occurred, so you may only see some Everest seeds appear as "missing".
There is no single fix for problems with rejected rate. All of the following areas can cause higher rejected rates:
- Investigate if certain content and URLs are generating an abnormal amount of end user complaints and are frequently bulked. These are indications that it may be time to update and test content and URLs to determine if deliverability has improved.
- If you send third party content, investigate if certain content (especially URLs/domains) are generating an abnormal amount of end user complaints and are frequently bulked. These are indications that the third party should update the content or the content should not be used.
- Check for Blocklistings in Everest by navigating to Monitoring>Reputation and click View Report on the Blocklisted tile.
- Troubleshoot and fix the cause of any active blocklistings. Click the elipsis icon on the far right side of the blockisting within the Blocklist History section for access to listing information as well as a delisting request form.
- Submit a delist request for an active blocklisting when the cause is fixed. If you request a delisting without fixing the cause, it is likely the listing will recur and future delist requests may be delayed or ignored.
- Check to make sure your SPF record is valid, up to date, and refers to the sending IP.
- Check to make sure your DKIM is functioning correctly.