Function to test most of the possible options of a connection:
function imapConfig($options, $i=0, $till = array()) {
if(sizeof($options)==$i)
return $till;
if(sizeof($till)==0)
$till[] = '';
$opt = $options[$i];
$new = array();
foreach($till as $t) {
foreach($opt as $o) {
if(strlen($o)==0)
$new[] = $t;
else
$new[] = $t.'/'.$o;
}
}
return imapConfig($options, $i+1, $new);
}
function imap_test($server, $port, $dir, $username, $passw) {
$options = array();
//$options[] = array('debug');
$options[] = array('imap', 'imap2', 'imap2bis', 'imap4', 'imap4rev1', 'pop3'); //nntp
$options[] = array('', 'norsh');
$options[] = array('', 'ssl');
$options[] = array('', 'validate-cert', 'novalidate-cert');
$options[] = array('', 'tls', 'notls');
$configOptions = imapConfig($options);
foreach($configOptions as $c) {
$mbox = @imap_open("{".$server.":".$port.$c."}".$dir, $username, $passw);
echo "<b>{".$server.":".$port.$c."}".$dir."</b> ... ";
if (false !== $mbox) {
echo '<span style="color: green"> success</span>';
}
else {
echo '<span style="color: red"> failed</span>';
}
echo '<br>';
}
}
imap_test('mail.server.de', 143, 'INBOX', 'username', 'pwd');