How To Automatically Add Border To Your Blog Post Images

Read The Guid Below

Login to your blogger blog  dashboard>>Click on Template>>Edit Html.

Note:  First Backup Your Blogger Template 

Copy the code below and paste it above  the b:skin tag on your blog template.

.post img {border:5px solid #d2d2d2;padding:2px;}

You can change the #d2d2d2 border  color code to any code of your choice.