Get reply mail to my server for a mail sent through php mail function

Hi, I am developing a system to send mail to all of our clients. If they reply to that mail, I want to retrieve the reply mails to my server. There is a way to connect through the IMAP/POP3 server, But it is taking a long time to load the mails. Is there any way to get the reply mails directly to my server. or ay other alternate way to get the mails fastly through IMAP

Please Help me in solving this issue