how to remove remote content when replying or forwarding emails
Remote Content in Messages articles explains that 1. remote content is blocked (NOT removed) 2. Remote content are parts of a message (such as images, stylesheets, or videos) which are not included in the message itself, but are downloaded from the Internet when you view the message.
Question: how can I find and remove that remote content from the when forwarding, replying or copy-pasting the content?
Alla svar (1)
You will have to remove any links to remote content, and since that is usually buried in the message source (Ctrl+U), it might be useful to reply or forward in plain text format to expose the unwanted code. If your default format is HTML, hold Shift when replying or forwarding (or starting a new message) to change the format to plain text. You could also copy from the message source, just the content that is necessary, excluding remote links and scripts.