Most link building outreach fails because your technical setup is sloppy or...

https://wiki-velo.win/index.php/Microsoft_SNDS_for_Cold_Outreach:_Is_It_Useful%3F

Most link building outreach fails because your technical setup is sloppy or your follow-ups are too aggressive. Instead of blasting thousands of emails, keep your volume under 50 prospects per day to stay off blacklists