To download the content of a mail with curl?

Hello everyone, I'm a newbie to programming..I need to download the content of an email from my gmail account in my decoder, can you help me?

the syntax which I use is:

username = "my_user"
password = "my_pwd"
popserver = "pop3s: //pop.gmail.com:995"
file = "/bin/file_name.tmp"




curl -u $username:$password --silent $popserver -X "LIST" > $file

but the output is a file_name.tmp empty, why?? Sorry but I do not know well the commands..

Quote from joeuser

Did you try without any spaces between "pop3s:" and "//pop...." ?

yes, I mistyped..

Quote from joeuser

Did you try with -v option instead of --silent to see what it says?

this is my output with -v

http://postimg.org/image/ufjxxyi0t/

The version of the curl file is 7.24.0

Quote from joeuser

Did you try just pop3 instead of pop3s? Some servers want normal connection first, then negotiate ssl.

The error is "error reading ca cert file /etc/ssl/certs/ca certificates.crt (Error while reading file.)"

I haven't the folder ssl in etc..I must install the certificates? How I do??

Quote from joeuser

You can also try the "-k" (insecure) option to rule out certificate errors...

I tried but it does not return any data or any errors ..

I solved with -k --insecure, I had not added "--insecure" in the line command..thank you very much for the moment..

Now I need to decode the file generated, containing the octets:

1 10646
2 8165
3 8188
4 38755
...
63 12435
64 8813
65 3568
66 3570

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Can you tell me the comand?