imap_open fails

PHP
1

Hi folks,

I have the following code


$mbox = imap_open("{mail.mydomain.com:143/imap/notls}INBOX", "newsletter@mydomain.com","xxxxxxx");

 if ($mbox)
 {
  echo "connected";
  imap_close($mbox);
 }
 else
 {
  echo "not connected :<br>" . imap_last_error();
 }

It is giving me the following output

not connected :
Unable to create selectable TCP socket (1919 >= 1024)

I am able to login to the account using telnet.

Any ideas what I am doing wrong?

Thanks in advance