Parsing a file line by line

I would like some assistance in creating a script that will parse a file line by line. The file that I need to parse has a designator at the beginning of most lines. I need the script to search for a specific designators (listed in an array) and then send an e-mail with the contents of each line. There will need to be a separate e-mail for each line. Example: $array = array( "A120", "B120", "D120" ); Text File: A120 Text B120 Text C120 Text D120 Text To make this more difficult... Occasionally, one of the lines may be followed by multiple other lines containing more information. I need to be able to get that information as well. The only distinct part of those lines following is that they start with 15 spaces. Example: D120 Text Text Text Text More Text More Text More Text Does anyone have any ideas for me? Thanks, Jason Williard