Email client with permissions?

mutt -R will open a mailbox in read-only mode.

Probably not what you wanted though ;-)

Theo

I use Thunderbird, and it's a bit too easy to drag messages inadvertently into an adjacent folder.

The most annoying thing I've found with Thunderbird is when the email is received in a html(?) format and a web browser has to be called up to open and to read it. The mail once opened in a web browser then goes missing from the list and a re-index of the folder has to be performed to make it appear again. It doesn't happen every time but in the past few years enough times to realise this is happening and the re-index is my first choice when I cannot find something (usually something I have read hours before, with a tracking number etc.).

alan_m snipped-for-privacy@admac.myzen.co.uk> posted

Not in my (old) version; there is a setting "View -> Message Body As -> Original HTML".

Yes, my wife (who uses a later version of Thunderbird) often has trouble with messages going missing, requiring a re-index.

On my T'bird (52.9.1 ) it's View > Message Body As > Plain Text.

Huh? never had that, if it's received in html I can view original html or simplified html within TB. If it has a plain text alternative, I can read that if I choose. The only time I have a problem is if it came from an old version of outlook in TNEF and just appears as a winmail.dat attachment.