Mutt kills file assignment assigned by column unix command

I have a well aligned CSV file.

• This was created using the command column -s, -t < myFile >myFormattedFile
  
  . It looks as expected.

• Now I want the same to appear in the body of gmail. And I use the commandmutt my@email -s my_subject < myFormattedFile
  
  

• However, in gmail, formatting is destroyed. Searching the internet I found that I can install set text_flowed=yes
  
  in muttrc. But even that doesn't work. -If I attach a file using an option -a
  
  in mutt, the formatting is preserved (opening the attachment). Also note that if the attached file is named myFormattedFile.csv, then google opens it with a formatted stripped table. This last point is just my additional observation.