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Exchange 2016 MCSE 70-345 > Transport Services > Flashcards

Flashcards in Transport Services Deck (175)
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31

What is the PowerShell command to Reject a message when a shadow copy fails to be created?

Set-TransportConfig
-RejectMessageOnShadowFailure:$true

32

Part of Transport, this feature will protect message resiliency while the message is in transit.

What is:

Shadow Redundancy

33

Part of Transport, this feature will protect message resiliency after the message has been delivered.

What is:

Safety Net

34

What is Safety Net?

Safety Net stores copies of successfully delivered messages, so they can be resubmitted into the transport pipeline if necessary.

35

When might Safety Net be used to resubmit a message?

• After a lossy failover of a database in a DAG.

• During activation of a lagged database copy.

36

How long will Safety Net hold copies of delivered messages for?

The default hold time is 2 days, but it is configurable at the organization level.

37

How should Safety Net be configured if you are using Lagged Database Copies?

The hold time of Safety Net should be set to match or exceed the longest lag time on your lagged database copies.

38

Powershell command to configure Safety Net Hold Time?

Set-TransportConfig
-SafetyNetHoldTime
10.00:00:00

(format is dd.hh:mm:ss)

39

How is Safety Net itself made redundant?

As long as Shadow Redundancy hasn't been disabled, then Safety Net is made redundant by Shadow Safety Net.

The the Primary Safety Net is unavailable for resubmission requests, Shadow Safety Net can service the requests.

40

At what point are messages moved into the Safety Net?

After a message has been successfully delivered to the recipient, the primary copy of the message is moved to Safety Net, and the shadow copy of the message is moved to the Shadow Safety Net (as long as Shadow Redundancy hasn't been disabled).

41

What database is Safety Net part of?

Safety Net is part of the Transport Database.

42

What is a Receive Connector?

Receive Connectors are used to receive e-mail from clients, servers, or other transport services.

43

What are the default Receive Connectors that come configured when you install Exchange?

• There are 5 default receive connectors created by Exchange.

• Each will have the server name in the Connector's name:

• Front End Transport Service Receive Connectors:
○ Default Frontend
○ Client FrontEnd
○ Outbound Proxy Frontend

• Transport Service Receive Connectors:
○ Default
○ Client Proxy

44

What is this Receive Connector, and what port does it use?

Default Frontend

• Bound to the Front End Transport Service

• Listens on Port: TCP 25

• Entry point for e-mail from non-Exchange systems into the organization.

45

What is this Receive Connector, and what port does it use?

Client FrontEnd

• Bound to the Front End Transport Service

• Listens on Port: 587

• Requires client authentication

• Used for secure, authenticated SMTP (protected by TLS)

• Used, for example, by POP and IMAP clients, and by internal devices or apps that are configured to use authentication.

46

What is this Receive Connector, and what port does it use?

Outbound Proxy Frontend

• Bound to the Front End Transport Service

• Listens on Port: 717

• Only used if a send connector is configured to proxy outbound e-mail via Front End Transport service.

• By default, send connectors are NOT configured in this way, so this Receive Connector is almost never used in the real world.

47

What is this Receive Connector, and what port does it use?

Default

• Bound to the Transport Service

• Listens on Port: 2525

• Accepts connections from other transport services on the same or different servers.

• That would include connections:

- that have been proxied from the Default Frontend connector,

- from Edge Transport servers,

- from Mailbox Transport services,

- or from other transport services on other servers.

48

What is this Receive Connector, and what port does it use?

Client Proxy

• Bound to the Transport Service

• Listens on Port: 465

• Accepts client connections proxied by Frontend services

49

For what reasons should you modify any of the Default Receive Connectors?

Generally, you should not modify them, except to do the following:

• Change message size limits

• Change rate limits

• Configure a TLS certificate to use on a particular connector

50

What is a Relay Connector?

A particular type of Receive Connector.

If a device or application needs to send e-mail messages, (such as for notifications, alerts, scan-to-email, etc.), Exchange can perform that service.

A connector built for this purpose is commonly called a Relay Connector.

51

What is the difference between Internal Relay and External Relay, and how are they configured?

Internal Relay works without any special configuration required.

The default Frontend Receive Connector is already configured to accept SMTP connections from anywhere, and the Exchange server will allow an anonymous sender to send e-mail to any internal recipients (since that is also how internet e-mail is treated).

But, if a sender tries to send e-mail to an external recipient, they must either use authentication (which will go through the Client FrontEnd Receive Connector), or an External Relay Connector must be configured to allow anonymous senders from specific IP addresses.

52

If more than one Front End Receive Connector is configured to listen on Port 25 for internal senders, how does an Exchange server know which connector to use?

The most specific match wins.

The Default Frontend Receive Connector is configured for all IP addresses. So, it is the least-specific configuration.

If a non-default Receive Connector has been configured with a specific set or range of IP addresses, then Exchange will use the connector that most specifically matches the source's IP address.

53

What is an "Accepted Domain"?

Accepted DOmains are SMTP namespaces that an Exchange organization is able to send and recieve e-mail for.

A domain must be added as an accepted domain before it can be used in e-mail addresses assigned to recipients.

54

What types of Accepted Domains are there?

There are three types of Accepted Domains:

• Authoritative

• Internal Relay

• External Relay

55

What is this type of Accepted Domain:

Authoritative

• A domain that the Exchange organization is solely responsible for.

• Exchange will only deliver e-mails to local recipients (that are within the local Exchange organization)

• All e-mail for unknown recipients is rejected.

56

What is this type of Accepted Domain:

Internal Relay

• A domain that the Exchange organization shares responsibility for.

• Recipients can be within the local Exchange organization, or can be located in an external mail system (whether another Exchange organization, or a third-party mail system).

• Exchange will first look for a local recipient, and if none are found, it will relay the mail off to another mail system.

• (A Send Connector handles the routing of the message to the other mail system.)

57

What is this type of Accepted Domain:

External Relay

• A domain for which Exchange has no local recipients, but can relay the messages to another mail system.

• Only recipients that are located in an external mail system.

• (A Send Connector handles the routing of the message to the other mail system.)

58

How can you assign e-mail addresses using sub-domains to recipients?

You can either configure the sub-domain as an Accepted Domain,

(for example, sales.company.com)

or you can add an Accepted Domain using a Wildcard.

(for example, *.company.com)

which will allow ANY subdomain to be used in e-mail addresses assigned to recipients.

59

Using e-mail address policies, how can you assign e-mail addresses using sub-domains to recipients?

If your Accepted Domain was configured with a wildcard, you cannot use its sub-domains in E-mail Address Policies.

Instead, you would need to add the specific sub-domains as their own Accepted Domain.

60

What is a "primary e-mail address"?

A recipient can have more than one e-mail address, but the primary e-mail address is the address that the e-mails they send will appear to be FROM.