Effective Outbound Marketing Channels and Strategies for B2B in D2C/E-commerce Space

Hi guys, quick question on outbound marketing. What channels have worked best for you in B2B, especially in the D2C/e-commerce space? Also, how do you approach actually selling a solution through outbound? I’ve been trying it lately, but the open rates and conversions have been quite poor. Our GTM is defined, but execution feels messy right now. Would really appreciate hearing what’s worked for you especially from those who’ve cracked outbound in this space.