i am rookie on security and hope somebody could help.
it's a telnet question; if anybody does a telnet command "o www.mydomainname.com
25" they get connected to the dedicated server so i assume this is where the website is hosted.
but also when doing a telnet smtp.mydomainname.com 25, they also get connected. is this a flow on our network?
i read that i would need to block port 25, is this the solution to go forward?
we use web access, so blocking 25 on the firewall would affect our email?
we use an external email antivirus protection.
thank you for reading and appreciate your help