Why is the contact image for my emails displayed as a question mark on Gmail client?
When you configure your domains with ZeptoMail, it is mandatory to complete the DKIM authentication. Sometimes the DKIM records added for your DNS can be altered or removed due to several reasons. For example, when you transfer your domains to a new DNS provider.
If you find that the Gmail client is displaying a question mark instead of your brand logo, it will be because your DKIM records were not found in the DNS. Add the DKIM records for your domain once again before sending further emails.