If you want to send emails on behalf of other people then we need to setup the send as and send on behalf permissions in microsft exchange 2010 or exchange 2007. Here is a step by step guide on how to do so.
In outlook web access you find you cannot send or reply to emails. This is a known issue and a patch has been released. Download the patch here.
A step by step guide on how to Setup Exchange 2007/2010 and Exchange 2013 Whitelists.How to allow email into your orginization only from whitelisted sources / email whitelists.
A send connector is used by exchange to send email to the internet or a specific address. Here is a guide on how to setup a send connector in exchange 2010 or exchange 2007.
You have created a new distribution group in exchange 2010 or 2007 but you are recieving no external mail. How to enable distribution groups for email externally.
If you have lost your public folders by accidentley deleting them from a client pc we can restore the public folders without a backup, here is how.