Understanding the Ports That Are Used by Exchange 2007 in a Mixed Environment

Artikel
01/23/2017

Microsoft Exchange Server 2007 will reach end of support on April 11, 2017. To stay supported, you will need to upgrade. For more information, see Resources to help you upgrade your Office 2007 servers and clients.

Applies to: Exchange Server 2007, Exchange Server 2007 SP1, Exchange Server 2007 SP2, Exchange Server 2007 SP3

This topic describes the ports that you must open to enable communication in a mixed environment that contains Microsoft Exchange Server 2003 and Microsoft Exchange Server 2007 computers. The following tables describe the specific ports that must be open between computers that are running different server and client roles.

Ports to Communicate Together With a Hub Transport Server

To communicate from this computer:	To an Exchange 2007 Hub Transport server, use these ports:
Exchange 2007 Hub Transport server	SMTP (25/587 TCP) SSL
Exchange 2007 Client Access server	No direct connection
Exchange 2007 Mailbox server	RPC MAPI (135 TCP)
Public Folders (hosted by an Exchange 2007 Mailbox server)	RPC MAPI (135 TCP)
SMTP Relay servers (in a perimeter network)	SMTP (25,995 SMTP TLS)
Exchange 2007 Unified Messaging server	SMTP (25,995 SMTP TLS)
Outlook 2003 client	No direct connection
Outlook 2007 client	No direct connection
Other clients (POP3/SMTP/IMAP4)	No direct connection
Exchange 2003 Bridgehead server	SMTP (25,995 SMTP TLS)
Exchange 2003 front-end server	No direct connection
Public Folders (hosted by an Exchange 2003 back-end server)	No direct connection
Exchange 2003 back-end server	No direct connection
Domain controller	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Ports to Communicate Together With a Client Access Server

To communicate from this computer:	To an Exchange 2007 Client Access server, use these ports:
Exchange 2007 Hub Transport server	No direct connection
Exchange 2007 Client Access server	80/443 TCP SSL
Exchange 2007 Mailbox server	RPC MAPI (135 TCP), many dynamic*
Public Folders (hosted by an Exchange 2007 Mailbox server)	RPC MAPI (135 TCP), many dynamic*
SMTP Relay servers (in a perimeter network)	No direct connection
Exchange 2007 Unified Messaging server	VoIP (TCP 5060,5061 SSL,5065,5066)
Outlook 2003 client	RPC over HTTP (80/443 TCP)
Outlook 2007 client	RPC over HTTP (80/443 TCP)
Other clients (POP3/SMTP/IMAP4)	POP3 (110/995 TCP), IMAP (143/993 TCP)
Exchange 2003 Bridgehead server	No direct connection
Exchange 2003 front-end server	No direct connection
Public Folders (hosted by an Exchange 2003 back-end server)	HTTP
Exchange 2003 back-end server	No direct connection
Domain controller	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Ports to Communicate Together With a Mailbox Server

To communicate from this computer:	To an Exchange 2007 Mailbox server, use these ports:
Exchange 2007 Hub Transport server	RPC MAPI (135 TCP), many dynamic*
Exchange 2007 Client Access server	RPC MAPI (135 TCP), many dynamic*
Exchange 2007 Mailbox server	RPC MAPI (135 TCP), many dynamic*
Public Folders (hosted by an Exchange 2007 Mailbox server)	RPC MAPI (135 TCP), many dynamic*
SMTP Relay servers (in a perimeter network)	No direct connection
Exchange 2007 Unified Messaging server	RPC MAPI (135 TCP), many dynamic*
Outlook 2003 client	RPC MAPI (135 TCP), many dynamic*
Outlook 2007 client	RPC MAPI (135 TCP), many dynamic*
Other clients (POP3/SMTP/IMAP4)	RPC MAPI (135 TCP), many dynamic*
Exchange 2003 Bridgehead server	RPC MAPI (135 TCP), many dynamic*
Exchange 2003 front-end server	No direct connection
Public Folders (hosted by an Exchange 2003 back-end server)	RPC MAPI (135 TCP), many dynamic*
Exchange 2003 back-end server	RPC MAPI (135 TCP), many dynamic*
Domain controller	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Ports to Communicate Together With Public Folders on a Mailbox Server

To communicate from this computer:	To the Public Folders (hosted by an Exchange 2007 Mailbox server), use these ports:
Exchange 2007 Hub Transport server	RPC MAPI (135 TCP), many dynamic*
Exchange 2007 Client Access server	RPC MAPI (135 TCP), many dynamic*
Exchange 2007 Mailbox server	RPC MAPI (135 TCP), many dynamic*
Public Folders (hosted by an Exchange 2007 Mailbox server)	RPC MAPI (135 TCP), many dynamic*
SMTP Relay servers (in a perimeter network)	No direct connection
Exchange 2007 Unified Messaging server	No direct connection
Outlook 2003 client	RPC MAPI (135 TCP), many dynamic*
Outlook 2007 client	RPC MAPI (135 TCP), many dynamic*
Other clients (POP3/SMTP/IMAP4)	RPC MAPI (135 TCP), many dynamic*
Exchange 2003 Bridgehead server	No direct connection
Exchange 2003 front-end server	RPC MAPI (135 TCP), many dynamic*
Public Folders (hosted by an Exchange 2003 back-end server)	RPC MAPI (135 TCP), many dynamic*
Exchange 2003 back-end server	RPC MAPI (135 TCP), many dynamic*
Domain controller	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Ports to Communicate Together With SMTP Relay Servers

To communicate from this computer:	To the SMTP Relay servers (in a perimeter network), use these ports:
Exchange 2007 Hub Transport server	SMTP (25)
Exchange 2007 Client Access server	No direct connection
Exchange 2007 Mailbox server	No direct connection
Public Folders (hosted by an Exchange 2007 Mailbox server)	No direct connection
SMTP Relay servers (in a perimeter network)	SMTP (25)
Exchange 2007 Unified Messaging server	No direct connection
Outlook 2003 client	No direct connection
Outlook 2007 client	No direct connection
Other clients (POP3/SMTP/IMAP4)	No direct connection
Exchange 2003 Bridgehead server	No direct connection
Exchange 2003 front-end server	No direct connection
Public Folders (hosted by an Exchange 2003 back-end server)	No direct connection
Exchange 2003 back-end server	No direct connection
Domain controller	No direct connection

Ports to Communicate Together With a Unified Messaging Server

To communicate from this computer:	To an Exchange 2007 Unified Messaging server, use these ports:
Exchange 2007 Hub Transport server	SMTP (25,995 SMTP TLS)
Exchange 2007 Client Access server	5060/5061/5062 TCP, dynamic
Exchange 2007 Mailbox server	RPC MAPI (135 TCP), many dynamic*
Public Folders (hosted by Exchange 2007 Mailbox server)	RPC MAPI (135 TCP), many dynamic*
SMTP Relay servers (in perimeter network)	No direct connection
Exchange 2007 Unified Messaging server	No direct connection
Outlook 2003 client	No direct connection
Outlook 2007 client	No direct connection
Other clients (POP3/SMTP/IMAP4)	No direct connection
Exchange 2003 Bridgehead server	No direct connection
Exchange 2003 front-end server	No direct connection
Public Folders (hosted by Exchange 2003 back-end server)	No direct connection
Exchange 2003 back-end server	No direct connection
Domain controller	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Ports to Communicate Together With an Outlook 2003 Client

To communicate from this computer:	To an Outlook 2003 client, use these ports:
Exchange 2007 Hub Transport server	No direct connection
Exchange 2007 Client Access server	No direct connection
Exchange 2007 Mailbox server	RPC MAPI (135 TCP), many dynamic*
Public Folders (hosted by Exchange 2007 Mailbox server)	RPC MAPI (135 TCP), many dynamic*
SMTP Relay servers (in a perimeter network)	No direct connection
Exchange 2007 Unified Messaging server	No direct connection
Outlook 2003 client	No direct connection
Outlook 2007 client	No direct connection
Other clients (POP3/SMTP/IMAP4)	No direct connection
Exchange 2003 Bridgehead server	No direct connection
Exchange 2003 front-end server	No direct connection
Public Folders (hosted by Exchange 2003 back-end server)	RPC MAPI (135 TCP), many dynamic*
Exchange 2003 back-end server	RPC MAPI (135 TCP), many dynamic*
Domain controller	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP), many dynamic*

Ports to Communicate Together With an Outlook 2007 Client

To communicate from this computer:	To an Outlook 2007 client, use these ports:
Exchange 2007 Hub Transport server	No direct connection
Exchange 2007 Client Access server	No direct connection
Exchange 2007 Mailbox server	RPC MAPI (135 TCP), many dynamic*
Public Folders (hosted by Exchange 2007 Mailbox server)	RPC MAPI (135 TCP), many dynamic*
SMTP Relay servers (in a perimeter network)	No direct connection
Exchange 2007 Unified Messaging server	No direct connection
Outlook 2003 client	No direct connection
Outlook 2007 client	No direct connection
Other clients (POP3/SMTP/IMAP4)	No direct connection
Exchange 2003 Bridgehead server	No direct connection
Exchange 2003 front-end server	No direct connection
Public Folders (hosted by an Exchange 2003 back-end server)	No direct connection
Exchange 2003 back-end server	No direct connection
Domain controller	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP), many dynamic*

Ports to Communicate Together With Other Clients

To communicate from this computer:	To other clients (POP3/SMTP/IMAP4), use these ports:
Exchange 2007 Hub Transport server	No direct connection
Exchange 2007 Client Access server	No direct connection
Exchange 2007 Mailbox server	RPC MAPI (135 TCP), many dynamic*
Public Folders (hosted by Exchange 2007 Mailbox server)	RPC MAPI (135 TCP), many dynamic*
SMTP Relay servers (in perimeter network)	No direct connection
Exchange 2007 Unified Messaging server	No direct connection
Outlook 2003 client	No direct connection
Outlook 2007 client	No direct connection
Other clients (POP3/SMTP/IMAP4)	No direct connection
Exchange 2003 Bridgehead server	No direct connection
Exchange 2003 front-end server	No direct connection
Public Folders (hosted by an Exchange 2003 back-end server)	RPC MAPI (135 TCP), many dynamic*
Exchange 2003 Back-end server	RPC MAPI (135 TCP), many dynamic*
Domain controller	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Ports to Communicate Together With an Exchange 2003 Bridgehead Server

To communicate from this computer:	To an Exchange 2003 Bridgehead server, use these ports:
Exchange 2007 Hub Transport server	SMTP (25,995 SMTP TLS)
Exchange 2007 Client Access server	No direct connection
Exchange 2007 Mailbox server	No direct connection
Public Folders (hosted by an Exchange 2007 Mailbox server)	No direct connection
SMTP Relay servers (in a perimeter network)	SMTP (25,995 SMTP TLS)
Exchange 2007 Unified Messaging server	No direct connection
Outlook 2003 client	No direct connection
Outlook 2007 client	No direct connection
Other clients (POP3/SMTP/IMAP4)	No direct connection
Exchange 2003 Bridgehead server	SMTP (25,995 SMTP TLS)
Exchange 2003 front-end server	No direct connection
Public Folders (hosted by an Exchange 2003 back-end server)	RPC MAPI (135 TCP), many dynamic*
Exchange 2003 back-end server	RPC MAPI (135 TCP), many dynamic*
Domain controller	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Ports to Communicate Together With an Exchange 2003 Front-End Server

To communicate from this computer:	To an Exchange 2003 front-end server, use these ports:
Exchange 2007 Hub Transport server	No direct connection
Exchange 2007 Client Access server	No direct connection
Exchange 2007 Mailbox server	No direct connection
Public Folders (hosted by an Exchange 2007 Mailbox server)	No direct connection
SMTP Relay servers (in a perimeter network)	No direct connection
Exchange 2007 Unified Messaging server	No direct connection
Outlook 2003 client	No direct connection
Outlook 2007 client	No direct connection
Other clients (POP3/SMTP/IMAP4)	No direct connection
Exchange 2003 Bridgehead server	No direct connection
Exchange 2003 front-end server	No direct connection
Public Folders (hosted by an Exchange 2003 back-end server)	RPC MAPI (135 TCP), many dynamic*
Exchange 2003 back-end server	RPC MAPI (135 TCP), many dynamic*
Domain controller	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Ports to Communicate Together With Public Folders on an Exchange 2003 Server

To communicate from this computer:	To the Public Folders (hosted by Exchange 2003 back-end server), use these ports:
Exchange 2007 Hub Transport server	No direct connection
Exchange 2007 Client Access server	RPC MAPI (135 TCP), many dynamic*
Exchange 2007 Mailbox server	HTTP
Public Folders (hosted by an Exchange 2007 Mailbox server)	RPC MAPI (135 TCP), many dynamic*
SMTP Relay servers (in a perimeter network)	No direct connection
Exchange 2007 Unified Messaging server	No direct connection
Outlook 2003 client	No direct connection
Outlook 2007 client	No direct connection
Other clients (POP3/SMTP/IMAP4)	No direct connection
Exchange 2003 Bridgehead server	RPC MAPI (135 TCP), many dynamic*
Exchange 2003 front-end server	RPC MAPI (135 TCP), many dynamic*
Public Folders (hosted by Exchange 2003 back-end server)	RPC MAPI (135 TCP), many dynamic*
Exchange 2003 back-end server	RPC MAPI (135 TCP), many dynamic*
Domain controller	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Ports to Communicate Together With an Exchange 2003 Back-End Server

To communicate from this computer:	To an Exchange 2003 back-end server, use these ports:
Exchange 2007 Hub Transport server	No direct connection
Exchange 2007 Client Access server	80/443 TCP
Exchange 2007 Mailbox server	No direct connection
Public Folders (hosted by Exchange 2007 Mailbox server)	RPC MAPI (135 TCP), many dynamic*
SMTP Relay servers (in perimeter network)	No direct connection
Exchange 2007 Unified Messaging server	No direct connection
Outlook 2003 client	No direct connection
Outlook 2007 client	No direct connection
Other clients (POP3/SMTP/IMAP4)	No direct connection
Exchange 2003 Bridgehead server	RPC MAPI (135 TCP), many dynamic*
Exchange 2003 front-end server	RPC MAPI (135 TCP), many dynamic*
Public Folders (hosted by an Exchange 2003 back-end server)	RPC MAPI (135 TCP), many dynamic*
Exchange 2003 back-end server	RPC MAPI (135 TCP), many dynamic*
Domain controller	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

Ports to Communicate Together With a Domain Controller

To communicate from this computer:	To a domain controller, use these ports:
Exchange 2007 Hub Transport server	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)
Exchange 2007 Client Access server	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)
Exchange 2007 Mailbox server	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)
Public Folders (hosted by an Exchange 2007 Mailbox server)	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)
SMTP Relay servers (in a perimeter network)	No direct connection
Exchange 2007 Unified Messaging server	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)
Outlook 2003 client	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP), many dynamic*
Outlook 2007 client	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP), many dynamic*
Other clients (POP3/SMTP/IMAP4)	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)
Exchange 2003 Bridgehead server	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)
Exchange 2003 front-end server	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)
Public Folders (hosted by an Exchange 2003 back-end server)	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)
Exchange 2003 back-end server	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)
Domain controller	LDAP (389/3268 TCP/UDP), Kerberos (88 TCP/UDP), DNS (53 TCP/UDP), RPC netlogon (135 TCP)

* By default, "many dynamic ports" is the port range 1024-65535.

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