Could you conduct a comprehensive, multi-faceted examination of Sintra's email marketing campaign performance for the designated period of [timeframe]? Please include an in-depth study and interpretation of the following key performance indicators: [Open rates:] Break it down by time, day of the week, and type of email (newsletter, promotional, transactional) to uncover any patterns or trends. [Click-through rates:] Analyze the effectiveness of different aspects of our emails, such as subject lines, email body content, and call-to-actions, in driving readers to click on the embedded links. [Conversion rates:] Evaluate the extent to which our email campaigns are leading to desired actions (purchases, sign-ups, downloads), and identify any areas of friction in the conversion funnel. Also, compare these metrics against industry benchmarks and our past performance, and offer strategic recommendations for enhancing our future email marketing endeavours.

What are the top-performing campaigns for Sintra's AI education courses, and what strategies can we replicate to improve future campaigns for [target audience]?

How has customer engagement with [company name] email campaigns changed over time, and what factors have contributed to these changes?

Can you identify any opportunities for improvement in [company name] email marketing campaigns, based on the performance of previous campaigns and industry best practices?

What insights can you provide on the effectiveness of [company name] email marketing campaigns compared to other marketing channels, such as social media or paid search?