Sometimes we receive spam emails which are targeted toward specific users. These carefully drafted emails are difficult to ignore as spam. Such emails need careful analysis. E.g., Some emails we receive contains the name and signature of the person known to us. The displayed "from" and "to" address in the mail client can also be forged. The following guidelines will help you to differentiate spam emails.
Video description of various interfaces and understanding the headers is available at https://www.youtube.com/channel/UCCkBlng0GssGjR0Me8P0OmA
In next sub-sections we illustrate by images. The highlighted areas in the images are numbered and explained.