Best Cold Call Follow Up

After a cold call visit, what is the maximum langth of a follow up email and what are you trying to accomplish?

My concern is that if they are more than a few sentences long, they won't be read through to the end. 

Looking for suggestions.
🧠 Advice
📞 Cold Calling
🔎 Prospecting
7
CoorsKing
WR Officer
13
Retired King of the Coors Knights
My cold follow ups consist of the below structure, typically listed out in bulleted sections

- Summary of what was discussed

- Summary of value you would bring

- Summary of next steps
InQ5WeTrust
Arsonist
6
No marketing, mayo isn't an MQL
This exactly. 
CuriousFox
WR Officer
7
🦊
1 opening sentence. 3 bullet points with call to action. 1 closing sentence. 
InQ5WeTrust
Arsonist
6
No marketing, mayo isn't an MQL
So long as you reference what you discussed, the value and the next steps... Then it's pretty hard to F up. 

If they don't respond then the follow up isn't the issue. 
Diablo
Politicker
1
Sr. AE
Minutes of discussion, Next steps and CTA
Pachacuti
Politicker
1
They call me Daddy, Sales Daddy
The email should summarize the visit, so length isn't really an issue.  To me, the most important thing is to deliver anything you promised and to get that "next step", or what they promised.