That is a function of your WordPress configuration and your ISP’s mail configuration. There isn’t anything that Email-Users can do about how your mail is received. It simply uses the WordPress infrastructure to send email.
thanks for your reply
can you please guide me where can i find this option in my wordpress?
There isn’t an explicit setting in WordPress for this option. The WordPress API supports email through the wp_mail() function.
It is hard to answer your question in the absolute because every hosting provider is different. You likely want your email to go out as “[email protected]” yet your hosting infrastructure may actually build it differently as it passes through their infrastructure. When it is finally received by the client (e.g. Gmail) it looks suspicious as is marked as SPAM.
Read this thread that discusses this issue.
I would also recommend reading this thread. I have had to use the WP Mail SMTP plugin myself on one site that is hosted on an IIS server.
Google has lots of information on this subject.