Dear Prospective Client from the US,
I am Godwin, a freelancer and a dedicated virtual assistant, I have taken some time to go through your project and enquiry if there is a better way to handle to project and I have also gone through your mail list which has 102 pages in pdf, Mail merge is the best option for this. I can handle same for you The letters are not to be typed one after the other as this will be exasperating and time consuming. As per the envelopes, label will be a better option to use in this case.
Chat me so we can talk more on this.
regards.