Hello, I have Kali Linux on VMware and Windows 10 host. This is an easy question. I'm trying bruteforcing with rockyou.txt on smtp. The subdomain I'm testing is mail.mywebsite.com. Not smtp.mywebsite.com. My question is, should I use port 25 for the mail? I did a scan with Metasploit Pro and found only 2 services "https 443" and "ident 113." 443 is open. Should I use port 443 for smtp bruteforce or port 25? I tried telnet mail.mywebsite.com 25 and it CAN'T connect (on Windows.) Then telnet mail.mywebsite.com 443 and the Windows command prompt goes black. If I hit anything it goes back to C:/ and closes telnet. So which port should I use? I've heard of running telnet or ssh on different ports. So which port should I use for bruteforcing the mail subdomain? Please reply. Thanks
