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.
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I found the problem, and seems so weird.
The problem was that in my e-mail’s html body the src attribute was referencing the image like <img src=“HTTP://www.image.local/image.jpg” alt=“” /> with the protocol upper case. After I rewrite the src value to “http://www.image.local/image.jpg” (protocol in lower case) the GMail return to show the image properly.
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