Hello folks, I have 2 Red Hat linux 9 servers and a few .phps with mail functions.I want to test whether those php are able to send the mail properly. Want to test on linux explicitly. I know I can send some test mail to root@localhost or smthg with localhost and test it. But i dunno the complete configuration and setup of it. Not even sure if there is somthing inbuilt or if i need to install something externally. Even if I am able to send it to root@localhost, how do I check its success??

Can somebody help me with the details as to how to go about testing and checking the configuration??? Really ned it urgently. Appreciate all the help and efforts. Thx in advance.