[header] How to address a resume envelope [title] Follow employer instructions. [step] Some companies do not want to deal with hard copy resumes, and will specifically request email or other submission. If the job ad is not specific, feel free to ask for clarification. 
[substeps] For jobs that aren't specific about email or online only, feel free to mail your resume in anyway. It can be a concrete way to demonstrate your interest in the position beyond simply submitting your application and help you stand out in the crowd.