3.3.5.1.2 Delivering Mail on a RopSubmitMessage or RopTransportSend Request

When a client sends either the RopSubmitMessage ROP request ([MS-OXCROPS] section 2.2.7.1) with the NeedsSpooler flag (0x02) not set or the RopTransportSend ROP request ([MS-OXCROPS] section 2.2.7.6), the server is to attempt to send the e-mail message to the intended recipients (2). For each recipient (2) in the recipient table that it can send the e-mail message to, it sets the R flag of the RecipientFlags field ([MS-OXCDATA] section 2.8.3.1).

When the NeedsSpooler flag is set, the server MUST place the message into the spooler queue folder.