0
With older versions of Thunderbird I used to be able to add an Approved
header to a message, but with later versions, even though I can get Approved
to show up on the list of headers, when the message is sent the header is missing. I've tried rolling back to an old version, but Thunderbird keeps updating itself and I can't seem to stop it.
Is there some other (Windows or Web) mail client that has this ability, or a plugin to Outlook or one of the others?
Alternatively, can you tell me how to stop Thunderbird from auto-upgrading?
Thanks.
Michael