Hi @samdobrow,
Thanks for your message.
It seems to be this is something that Gmail is doing with the URL of the image. Alternatively, if you’re running the email trhough an SMTP or SES service that relies on Google, then this may be causing the issue too.
Sadly, I don’t think that’s something I can help with directly from within the plugin.
Sorry I can’t help more but hoping the above may point you in the right direction.