LTS 22 - using sshpass

[Robert Moskowitz]

I have a system that I need to automate an rsync transfer to.  This 
system only supports userid/password SSH connections.  So I installed 
sshpass and tried:

sshpass -pmypasswd ssh -p 1234 -4 me at myserver.domain

this runs and goes right back to the command prompt.   Does not seem do 
anything.

Is there a better way?  BTW this will go in a

rsync -e "ssh command" sourcedir dest server:dir

I got this to work without sshpass, but of course gets prompted for the 
user passwd...

thanks