This document summarizes Kath Pay's presentation on B2B email deliverability. The key points are: 1) B2B email faces unique challenges due to enterprise email systems that are set to strict filtering by default. These systems protect 80% of email. 2) Poor deliverability means no clicks, no ROI, and lost revenue. Spam is defined by what recipients think, so building a good sender reputation is important. 3) The top five factors that affect deliverability are permission, list management, technical infrastructure, relevance/engagement, and content/message design. Monitoring reputation scores and following best practices in these areas can improve deliverability. 4) Resources for monitoring reputation scores