First, ***THANK YOU FOR BRINGING THIS TO META***!  
Most people don't listen when I invite them to do so, and the fact that you did wins you major brownie points in my book.

***

In [my comment on the question](https://serverfault.com/questions/458163/does-sftp-server-via-ssh-server-on-linux-support-file-transfer-resume#comment503201_458163) I noted that I felt the question was borderline.

The question is **On Topic** because:  

- It's related to an activity often performed in a professional setting (file distribution)
- It is generally a reasonable question to ask: "Does `X` support `Y`?"

The question is **Off Topic** because:

- You're talking about "your friends"  
  This smells of "home use", but alone is not enough to doom it.
- It doesn't show much research/troubleshooting on your part  
  ("I'm Guessing" is bad. "I checked X, Y, and Z but didn't get an answer, so I tried A, B, and C with these results..." is great. Something anywhere in the middle is acceptable.)
- Though not explicitly requesting a product recommendation, it smelled like one to me.  
  (in fairness it could also be client configuration).

Basically my tally was 3-to-2 in favor of leaving it closed until it could get edited into better shape. [Our resident kitty has taken a swing at it](http://meta.serverfault.com/a/4032/32986), and the result is if not perfect at least good enough to keep open :-)