Module 5
Managing Message
Transport
Module Overview
• Overview of Message Transport
• Configuring Message Transport
Lesson 1: Overview of Message Transport
• Discussion: Overview of Message Flow
• Components of Message Transport
• How Are Messages Routed in an Exchange Server
Organization?
• How Are Messages Routed Between Active Directory Sites?
• Options for Modifying the Default Message Flow
• Tools for Troubleshooting SMTP Message Delivery
• Demonstration: How to Troubleshoot SMTP Message
Delivery
Discussion: Overview of Message Flow
• What is SMTP?
• What are the various message-flow scenarios?
• What type of message-flow scenarios do most
organizations implement?
Components of Message Transport
Component
Description
Submission queue
Stores all messages on disk
until processed
Store driver
Retrieves messages from
sender’s Outbox
Microsoft Exchange Notifies a Hub Transport server in the local
Active Directory site when a message is
Mail Submission
available for retrieval from a sender’s Outbox
service
Processes one message at a time from the
Categorizer
Submission queue
Pickup directory
Submits messages to the Submission Queue
How Are Messages Routed in an Exchange Server
Organization?
Client Access
server
1
Outlook
client
Mailbox server
2
3
Hub Transport
server
4
6
Internet
5
How Are Messages Routed Between Active
Directory Sites?
Source
Site
20
Default
message
flow
20
10
10
Queue at
the point
of failure
10
Delayed
fan-out
Destination Site
Options for Modifying the Default Message Flow
To modify the default message flow, you can:
Configure hub sites to add additional hops to the
message delivery
Configure Exchange-specific routing costs to override
the IP site link costs
Configure expansion servers for distribution groups
Tools for Troubleshooting SMTP Message Delivery
Tool
Description
Exchange Server Best
Practices Analyzer
Use to check the configuration and health of the
Exchange topology
Exchange Mail Flow
Troubleshooter
Use to troubleshoot common mail-flow problems
Queue Viewer
Use to view and manage undelivered messages
Use to confirm message delivery
Message Tracking &
Tracking Log Explorer
Routing Log Viewer
Use to view the message routing topology
Protocol Logging
Use to provide detailed protocol-level information
Telnet
Use to check if the SMTP port responds or to directly
send a SMTP mail to a connector
Demonstration: How to Troubleshoot SMTP
Message Delivery
In this demonstration, you will see how to:
• Use Telnet to check if Exchange Server responds correctly
• Use Queue Viewer to troubleshoot SMTP message delivery
Lesson 2: Configuring Message Transport
• Process for Configuring Hub Transport Servers
• Demonstration: How to Configure Hub Transport Servers
• Options for Configuring Message Transport
• What Are Accepted Domains?
• What Are Remote Domains?
• Demonstration: How to Configure Accepted and Remote
Domains
• What Is an SMTP Connector?
• Demonstration: How to Configure SMTP Send and Receive
Connectors
• What Is Back Pressure?
Process for Configuring Hub Transport Servers
To configure a Hub Transport server:
1 Configure server-specific settings
Configure authoritative domains and e-mail
2 address policies
3 Configure a postmaster mailbox
4 Configure Internet message flow
5 Configure messaging policies
6 Configure administrative permissions
Demonstration: How to Configure Hub Transport
Servers
In this demonstration, you will review:
• Options at the global and server level
• Default configuration
• Options for changing the default configuration for Hub
Transport servers
Options for Configuring Message Transport
• Transport rules
• Rights protection using transport protection rules
• Journaling
• Enhanced disclaimers
• Moderated transport
• Anti-spam and antivirus protection
What Are Accepted Domains?
Accepted domains define SMTP domain names for which the
Exchange server will accept e-mail
Accepted domains can be:
• Authoritative domains
• Internal relay domains
• External relay domains
What Are Remote Domains?
Remote domains define SMTP domains that are external to
your Exchange organization
Properties of remote domains are:
• Out-of-office message delivery
• Message format options including acceptable character sets
Demonstration: How to Configure Accepted and
Remote Domains
In this demonstration, you will review:
• The default accepted domain configuration
• How to configure accepted domains
• How to configure one remote domain
What Is an SMTP Connector?
SMTP connectors are Exchange Server components that
support one-way SMTP connections
SMTP Receive Connectors:
• Accept SMTP messages from other hosts
• Must use a unique combination of port number, listening
IP address, and accepted remote IP addresses
SMTP Send Connectors:
• Send SMTP messages to other servers
• Are required to send e-mail to any SMTP server
Demonstration: How to Configure SMTP Send and
Receive Connectors
In this demonstration, you will see how to:
• Create and configure a SMTP Send connector
• Create and configure a SMTP Receive connector
What Is Back Pressure?
Back pressure is a system-resource monitoring feature that you
can use to:
• Monitor system resources such as available hard disk,
drive space, and memory
• Restrict new connections and messages if a system resource
exceeds a specified level
• Prevent the server from being completely overwhelmed
Resource
Utilization Level
Description
Normal
The resource is not overused. The server accepts new
connections and messages
Medium
The resource is slightly overused. Back pressure is applied
to the server in a limited manner. Mail from senders in the
authoritative domain can flow. However, the server rejects
new connections and messages from other sources
High
The resource is severely overused. Full back pressure is
applied. All message flow stops, and the server rejects all
new connections and messages
Lab: Managing Message Transport
• Exercise 1: Configuring Internet Message Transport
• Exercise 2: Troubleshooting Message Transport
• Exercise 3: Troubleshooting Internet Message Delivery
Logon information
Virtual machines
10135A-VAN-DC1,
10135A-VAN-EX1,
10135A-VAN-EX2
User name
Administrator
Password
Pa$$w0rd
Estimated time: 60 minutes
Lab Scenario
You are a messaging administrator in A. Datum Corporation,
which is a large multinational organization that includes offices
in London, Tokyo, and Vancouver, which is its headquarters.
Your organization has deployed Exchange Server 2010 in two of
its sites. However, all Internet messages should flow through
the main site in Vancouver. As part of your job responsibilities,
you need to set up the message transport to and from the
Internet and also ensure that the message flow works within
and between the various sites.
Lab Review
• What would you need to configure to enable outbound
Internet e-mail from each of Adatum‘s location?
• A user calls and reports that she sent a message to a user
in another company two hours ago, and the message has
not arrived. How would you troubleshoot this?
• After A. Datum. bought some new locations, you want to
make sure that all e-mail messages are passed through
the main site in Vancouver. How would you do that?
Module Review and Takeaways
• Common Issues and Troubleshooting Tips