How long should my sponsorship pitch email or voicemail be?

Keep emails to 5-10 sentences maximum covering your value proposition. For voicemails, keep them to 30-40 seconds with quick, concise messaging. Marketing managers don't have time to read four-page paragraph-spaced emails. Instead, use one compelling factoid - for example: '80% of our viewers are under 34' or 'We have more YouTube followers than NASCAR and NHRA combined. Give me a call back if you find that interesting.' Plant a seed in their mind rather than overwhelming them with information.