GMail not show images from my email marketing
Recently all images on a email composed by my email marketing app is not showing in GMail.
The images are stored on subdomain as http://beta.newsmacweb.com.br/uploads/assets/cartoes/854babae11c07e563b46e2a86c463a02_cartaomacweb.jpg
I have tried to add an image from http://www.newsmacweb.com.br/images/site/logo.png and it appears, so it seems an issue with subdomains.
Anyone can try to point me what to look for? I have looked for security issues, I have read the logs to see if any Google server request is blocked but none is logged.