We have some automated software that checks certain Exchange 2007 mailboxes via POP3. When a customer's incoming e-mail requests a read receipt, Exchange seems to be sending back a non-read receipt.
Not read: <subject> Your message was deleted without being read on...
The order in which the software issues POP3 commands is
USER PASS STAT UIDL TOP # 0 LIST # RETR # TOP # 0 RSET DELE # QUIT
Our exchange administrator has been able to duplicate this issue via raw POP3 commands over telnet, port 110. The commands he ran were simply
USER PASS STAT RETR # DELE # QUIT
Does Exchange 2007 translate POP3 commands to read flags? If so, it should tell that I've issued a RETR command to retrieve the message. Is this a bug? Is there a way to disable the sending of read receipts for specific mailboxes or globally?