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Prequisite for installation of Exchange Server:
IIS, SMTP, WWW service ,NNTP, W3SVC
NET Framework
ASP.NET
Then run Forestprep.exe
The run domainprep.exe
Standard port numbers for SMTP, POP3, IMAP4, RPC, LDAP and Global Catalog:
25 SMTP
110 POP3
143 IMAP4
135 RPC
389 LDAP
636 LDAP (SSL)
3268 Global Catalog
465 SMTP/SSL
993 IMAP4/SSL
563 IMAP4/SSL
53 DNS
80 HTTP
88 Kerberos
102 X.400
110 POP3
119 NNTP
137 - [...]

Hello everyone,
I just had the pleasure of not properly shutting down 2 exchange 2003 servers due to some urgent issue we had..
As we were powering them up, everything seemed OK except when a user tried to login, they would get a “503 - Service Unavailable”.
Hmm ok, i thought maybe there’s something wrong with IIS so i ran [...]

Yep, i too have experienced this problem (grr microsoft)..
They do have a KB atricle for this: http://support.microsoft.com/kb/829361
Cause:
This issue may occur when the following conditions are true:

The Microsoft Active Directory directory service closes before Exchange 2003 services are fully stopped during the computer shut down process.
Exchange 2003 is installed on a domain controller computer that is [...]

Hi All,
Today i had the wonderful pleasure of trying to figure out how to send an email from a email distribution group (active directory group).
The distribution group is ‘Support (support@xxxxxxx.com.au)’ which recieved all support emails. The user wanted to send & reply to emails from the support email address.

I had actually tried to send from this distribution group [...]