External Email - Use Caution        

Dear Freesurfer experts,

I was tiring to install fs_install using the below command.
cd $FREESURFER_HOME/bin && curl MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://raw.githubusercontent.com/freesurfer/freesurfer/dev/scripts/fs_install_mcr -o fs_install_mcr && chmod +x fs_install_mcr
It showed an error message saying permission denied so I added sudo as suggested here.
MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg66199.html

However, even after adding sudo in front, it shows the same error message. 

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  2010  100  2010    0     0  17104      0 --:--:-- --:--:-- --:--:-- 17179
chmod: Unable to change file mode on fs_install_mcr: Operation not permitted


Could you please let me know how to resolve this?

Best,
JW