I have three email accounts, all with the exact same settings in Thunderbird but two of them do weird stuff. My main account, when I delete an email it goes into the delete folder, as it should. The other two accounts though, the deleted emails just disappear, never to be seen again. I've used Thunderbird for several years and know my way around it but this has me stumped :/ I need to be able to refer back to deleted emails on occasion.