how to get mailbox in my server with php source

I try this source :

imap_open( "{" . $mailserver . ":" . $port . "}INBOX", $user, $pass );

but is Error, I dont know why? please help me. error

Can't con开发者_C百科nect: Certificate failure for mail.xxxxxxxx.com: self signed certificate: /C=US/ST=Unknown/L=Unknown/O=Unknown/OU=Unknown/CN=terra.duoserversindonesia.com/emailAddress=ssl@terra.duoserversindonesia.com

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Try this:

imap_open( "{" . $mailserver . ":" . $port . "/novalidate-cert}INBOX", $user, $pass );

Have a look at the flags listed here for more help: http://www.php.net/imap_open