No images in email

Product Support
1

Your software
My Mautic version is: 3.3.3
My PHP version is: 7.3.26
My Database type and version is: MySQL 8.0

Your problem
My problem is:
When sending emails, the recipient sees a placeholder image rather that what was inserted into the email, and sometimes the emails go into their spam folder.

These errors are showing in the log:
As far as I can tell no error log record was created

Steps I have tried to fix the problem:
I noticed that the cache was not writable, and could not attribute the correct security to the folder, so I updated mautic to the current 3.3.3 version and was able to attribute the correct security. Finally, I set up LetsEncrypt, and sent a last email to myself, but it has no images and was delivered to my spam folder.

2

In my opinion this should be an option of the email channel item, if images should be included (as base64 encoded) or referred (link to image-data as Mautic-URL). The latter one is a way to safe space but also know if a user has watched at it.