Какие порты использует Exchange

SMTP TCP: 25
The SMTP service uses TCP port 25.

DNS TCP/UDP: 53
DNS listens on port 53. Domain controllers use this port.

LSA TCP: 691
The Microsoft Exchange Routing Engine service (RESvc) listens for routing link state information on this port.

LDAP TCP/UPD: 389
Lightweight directory access protocol (LDAP) used by Microsoft Active Directory® directory service, Active Directory Connector, and the Microsoft Exchange Server 5.5 directory use this port.

LDAP/SSL TCP/UDP: 636
LDAP over Secure Sockets Layer (SSL) uses this port.

LDAP TCP/UDP: 379
The Site Replication Service (SRS) uses this port.

LDAP TCP/UDP: 390
This is the recommended alternate port to configure the Exchange Server 5.5 LDAP protocol when Exchange Server 5.5 is running on an Active Directory domain controller.

LDAP TCP: 3268
Global catalog. The Windows 2000 and Windows Server 2003 Active Directory global catalog (a domain controller "role") listens on TCP port 3268.

LDAP/SSLPort TCP: 3269
Global catalog over SSL. Applications that connect to TCP port 3269 of a global catalog server can transmit and receive SSL encrypted data.

IMAP4 TCP: 143
Internet Message Access Protocol (IMAP) uses this port.

IMAP4/SSL TCP: 993
IMAP4 over SSL uses this port.

POP3 TCP: 110
Post Office Protocol version 3 (POP3) uses this port.

POP3/SSL TCP: 995
POP3 over SSL uses this port.

NNTP TCP: 119
Network News Transfer Protocol (NNTP) uses this port.

NNTP/SSL TCP: 563
NNTP over SSL uses this port.

HTTP TCP: 80
HTTP uses this port.

HTTP/SSL TCP: 443
HTTP over SSL uses this port.

Дополнительно:

http://technet.microsoft.com/en-us/library/bb124075.aspx