Solicited sales email distribution - advice needed

[Gary Stainburn]

Hi Folks.

I have at work one of our salesmen who has an opt-in stock-list distribution 
that has been running for some time now. He has in excess of 2500 recipients 
on this list.

Up until now he has simply had a Distribution list in his MS Outlook which he 
maintains himself. He then sends himself an email every week containing the 
stock list and BCC's the distribution list.  Other than generating an 
excessive load on my EXIM server there has been no  real down side to this as 
it meant that I didn't have to get involved.

However, we are now experiencing problems and I would like a better solution.

I need a system that will distribute the email to each recipient as a seperate 
message, and if possible will monitor and highlight any emails that fail.

Can anyone suggest a way of doing this? Ideally I would like the salesman to 
still be able to administer it but that isn't essential. If it is a system 
that is either text file or database driven  I can create a UI that he would 
be able to use.

Gary