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To DCGLug Attention List DCG LUG <list@xxxxxxxxxxxxx> copy: maceion (Gmail) <maceion@xxxxxxxxx> Dear Sirs, 20210501 Help in understanding Roundcube mail & network On my domain, the internal email system works normally over Thunderbird, and also uses when connecting by webmail the programme Roundcube. The webmail system causes me to ask about how it works. Roundcube is the same programme used for the Vivaldi Browser Community webmail if you want to see presented screen on a Vivaldi browser. If you wish to see it in action. In composing it gives a web-screen where body of text can be entered and where attachments can be uploaded. This can be saved as a 'draft' for later re-use or editing. The program Roundcube is stated to be 'encrypted' from users machine to server for the domain. (https connection) To read an attachment in a saved draft in the drafts folder, there are two options: "open" and "download". 1) "Open" This appears to open the relevant programme on the local connected computer to see and then act on the opened attachment. E.g. a draft saved attachment ".odt" file is opened in local Libreoffice Writer or local word processor programme. Is this a direct opening from the saved visible draft on email server to the local computer? Can you confirm? It does not appear to pass over the internet. 2) "Download", 2.1 Here it is not obvious if the download is a local thing, that is from draft screen open on local computer to local computer download file storage OR 2.2 if like a sent email, it is passed by the programme to local machine over an exposed internet system of connections from 'compose page' with the saved draft to local machine. This could expose sensitive subjects to the internet traffic watchers. In a received email both body text and any attachments would have passed over the internet to the local machine. This is what my contact does not want. They do not want 'draft saved attachments' to transit internet as does a normal email in delivery. 3. Any thoughts? -- Regards Eion MacDonald -- The Mailing List for the Devon & Cornwall LUG https://mailman.dcglug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq