Circling back on this, can you try going to the Maintenance page and running the "Rebuild social group members" and see if that fixes the issue? It should already have ran post import but maybe it didn't finish correctly for whatever reason.
Uploading images to emails would not resolve that issue as they would still be in the attachments system. Images should be hosted outside of the XenForo attachments system.
You have to use the full HTTP URL for images. Furthermore, some email clients block loading remote content by default, so even using the full URL may not display correctly depending on your mail client's settings.
Because you don’t download it from there. You won’t see a “Get free” button because you are the owner of the product. If you log in with another account, you’ll see the “get free” button on the product page.
Update: I have added Bounce Rate, Bounces and Complaint Rate integration with Daily Stats in XenForo.
This also works with rebuilding historical statistics.
While I have been able to find a way to query the average bounce rate and complaint rate from CloudWatch, and I may be able to query alarms (to be investigated), there is absolutely no way I'm going to create any form of sending restrictions based on the resulting data.
Partially because this...
This does not appear to be feasible. XenForo itself does not include the SES part of the AWS API, and installing the AWS package causes the size of the generated zip file to balloon to 39 MB.
If you know of a way around this I'd be interested, but if not, this cannot be added to DB Mail.