Line 16 pulsepoint.com is not the canonical exchange domain. Use contextweb.com instead.
Line 22 pulsepoint.com is not the canonical exchange domain. Use contextweb.com instead.
Line 29 Ad system domain piximedia.com is not a known exchange domain. Ensure the spelling is correct, check the partner documentation, or have the partner update the IAB Tech Lab normalization mappings: https://wiki.iabtechlab.com/index.php?title=Ads.txt_Normalization_Mappings