how to exit in bash script from ProFTPD via netcat after some copy operations

I am connecting to a proftpd server via netcat nc 10.10.239.150 21 Then I am doing some copy operations like "The mod_copy module implements SITE CPFR and SITE CPTO commands" After "250 Copy successful" i want to exit this netcat connection and continue with the bash script. I already tried following call, with CPFR and CPTO instructions outsourced to a msg.txt file nc 10.10.115.253 21 < msg.txt But still I dont know how to exit the netcat proftpd connection after successful proftpd operations. Several tried EOF instructions are not understood by nc/proftpd: Only the CTRL C user input does the job, but this should be done automatically.