I am using gmail server for sending email but it has reached to limit for sending emails. Is there is another way to create own mail server in rails which send and receive emails ???
Rails does not provide a system to create a mail server, because that is a completely different thing and not a part of the web framework.
I personally use https://www.mailgun.com/ - they give 10,000 emails a month for free, you might want to check them out.
So, mailgun how much receive the email a month and per day ???
They have 10,000 limit per month. I think sending and receiving combined.
Daily limit depends on your sending reputation.
Just contact them directly if you have any questions.