It signifies legitimate bulk emails that a recipient as soon as signed up for but could not be interested in. Newsletters, everyday specials, and updates from social media marketing platforms often fall into this classification. Inside the preceding area, we warned you that defining your bulk email recipients in https://www.upwork.com/services/product/development-it-email-deliverability-inbox-reduce-spam-dns-issues-fixed-dkim-spf-dmarc-1378055073774727168?ref=project_share&tier=0