Message Delivery to and from the Internet 43novdocx (en) 22 June 20094.5 TCP/IP Link: Inbound Transfer from theInternet SuccessfulThis message flow diagram illustrates how inbound message flow from the Internet through theGroupWise directory structure to the GroupWise recipient. The link between the Internet Agent andthe MTA for the recipient’s domain is a TCP/IP link.InternetAgent forSender’sDomainThe Internet Agent analyzes the files in the result directory, comparing theSMTP reply codes in the R*.* file.If the R*.* file has a temporary transmission error (meaning it has a 400-levelSMTP reply code such as 450 Host Down), the Internet Agent moves the S*.*message file to the defer directory. Continue with StageIf the R*.* file has a fatal error (meaning it has a 500-level SMTP reply codesuch as 550 Host Unknown), the Internet Agent deletes the S*.* file because itis undeliverable. Skip to StageInternetAgent forSender’sDomainBased on the Intervals to the Retry a Deferred Message setting on the SMTP/MIME Settings property page of the Internet Agent object in ConsoleOne, theInternet Agent requeues the S *.* message file back into the send directory forreprocessing.InternetAgent forSender’sDomainAfter an S*.* message receives 400-level SMTP reply codes until theMaximum Number of Hours to Retry a Deferred Message setting is reached, orif a message receives 500-level SMTP reply codes, the Internet Agent deletesall related schedule files from the defer directory because the message isundeliverable. The Internet Agent then creates an Undeliverable statusmessage for the MTA to pick up and return to the sender.MTA forSender’sDomainBecause of its mapped/UNC link with the Internet Agent, the MTA scans its inputqueue in the Internet Agent’s gateway directory based on the Scan Cycle settingon the Agent Settings page of the MTA object in ConsoleOne. The MTA picks upthe Undeliverable status messages and transfers them to its “in progress“(gwinprog) directory for processing.MTA forSender’sDomainThe MTA for the sender’s domain communicates the Transferred statusmessages to the POA for the sender’s post office by way of TCP/IP.POA forSender’s PostOfficeThe POA for the sender’s post office updates the sender’s message database(msgnnn.db) with the Transferred status information.POA forSender’s PostOfficeThe POA for the sender’s post office communicates the Transferred status tothe sender’s GroupWise client by way of TCP/IP.Sender When the sender checks the sent items in his or her mailbox in the GroupWiseclient, the message displays the Transferred status because the Internet Agentwas able to send it successfully.Stage Icon Description