How to stop outlook from popping up on an excel spreadsheet
 

When I change information in a certain column on a particular excel
spreadsheet, outlook automatically pops up. Also, my spread sheet in this
column automatically prints everything in blue as if it is an internet link.
How do I stop this.

Also why doesn't my send button show for outlook. One organization that I
correspond with has outlook automatically pop up. I can type an email
message, but there is no way to send it.