Are they using POP3 or IMAP? How did he "lose" his emails? Deleted them? Troy Murray Michigan State University College of Medicine B136D Life Science E: [log in to unmask] P: 517-353-9576 F: 517-355-7254 RedHat 5 Certified Technician RedHat 5 Certified Systems Administrator HL7 V2.6/2.5 Certified Control Specialist On Nov 14, 2011, at 12:42 PM, Oscar Castaneda wrote: > This is more of a curiosity than anything else: > I did this exercise: > One user downloads all his email from mail.msu.edu to Thunderbird, but always leaves the email at mail.msu.edu without deleting them. > Now he lost some email from his Thunderbird and he wants to download it again. > He goes to mail.msu.edu and marks those emails as "Unread", or "Unseen". > Goes back to Thunderbird and downloads his email. > Thunderbird does not see the emails marked as unread as new email. > > So....the unread flag that you set does not really marks the email as unread. It marks it as something else. Am I missing something here? > > > > -- > Oscar Castaņeda > Global Observatory for Ecosystem Services > Michigan State University