I have a CentOS server which does not have the mail client. I do not have sudo access to install it or to install mutt.
What may be the best alternative that I can use to send myself an email to notify a failure/success of a process that I run on this server?
Maybe you could write a quick script in Python doing the job. Python is surely already installed, and you will be able to do the whole job with the standard library. Here is a small example as a starting point: https://docs.python.org/2/library/email-examples.html Regards.