I have two mail accounts in Thunderbird that have permanently lost connection to their respective servers. I need to create permanent accessible offline archives of these emails. Thunderbird cannot archive emails when the server connection is lost. I've tried a plugin export addin, doesn't work. The emails are there on my computer. But I can't access them through my normal profile. Looking for someone who knows and can modify the basic behaviour of Thunderbird. The task is to modify those two accounts so that Thunderbird profile sees them as a local folder not a standard 'live' mailbox (where it constantly attempts to connect to server and won't allow access to the emails held offline). The folders are there on my hard drive, but something needs to be done to the profile to recognise them as local folders rather than live accounts. i.e. working like a PST file in Outlook. Happy to pay consultancy if this needs bespoke coding.