Automatic Email from an Excel Cell Data Entry

First post, first question (so be gentle):

I have a spreadsheet that tracks different production lines. Once all the lines are complete, I manually put a completion date in a cell. I would an automatic email to be sent out to a group of salesman letting them know that this project is complete.

I can attach a copy of the spreadsheet if required, but it is a jumbled mess.

Thanks in advance.

Yes, that can be done with a change event on the sheet. If you have q trimmed version of the file, post it here, and one of the developers here will look at it.