I have a customer who is looking to do large scale daily dynamic contact mailings, and they want to do it with active directory if possible. This screams third party product to me, but I am looking for second opinions. Here is the recap. The customer wants to daily; 1) Remove all entries from the day before. 2) Get 17 formatted text files from an internalweb server. 3) Create 17 Distribution groups based on the name of those files. 4) Add approxiamtely 7500 users to the distribution groups which are parsed from the text files using automation. 5) Some users are AD integrated already (10%) 6)The external contacts do not exist in AD (90%) 7) Mass mailing will be sent from the newly created Distribution groups. 8) The next morning all contacts and distribution groups from the previous day must be removed using automation. 9) There is a 1 hr window for all this to take place daily from 6am to 7am. Thoughts or suggestions?

Hi, Looks like some scripting and development work involved. You may get batter ideas in development forum if you post your query in it. TechNet Forums Exchange Server Development