I want to send mail through "telnet smtp.gmail.com 25" but an error is prompted when sending a message "530 5.7.0 Must issue a STARTTLS command first".
I am working on Ubuntu Linux Server. I googled out, and installed ssmtp and tried to add a few lines in ssmtp.conf file so that I could send mail through telnet.
But, since the file is read only and also I am not able to change the user rights, Permission Denied. Since I am the administrator of my own system, how can I edit the file and add few lines of code in it?
Also, please tell me whether these techniques will work for me, or any other useful technique available where I can send mails by telnetting.