» Prüfen ob lokales E-Mailpostfach existiert

<?php
$socket = fsockopen("localhost", 25, $errno, $errstr, 30);
echo(fgets($socket, 256)) . "<br />\n";
fwrite($socket, "HELO " . gethostname() . "\r\n");
echo(fgets($socket, 256)) . "<br />\n";
// this e-mail address must exist!
fwrite($socket, "MAIL FROM: <exists@example.org>\r\n");
echo(fgets($socket, 256)) . "<br />\n";
// this e-mail address is the one we want to check:
fwrite($socket, "RCPT TO: <anonym@example.org>\r\n");
echo(fgets($socket, 256)) . "<br />\n";
?>

Zitat

220 *** ESMTP Exim 4.80.1 Wed, 03 Sep 2014 15:16:07 +0200
250 *** Hello localhost [127.0.0.1]
250 Input accepted, please continue
250 Your input was accepted by the SMTP server

Zitat

220 *** ESMTP Exim 4.80.1 Wed, 03 Sep 2014 15:18:21 +0200
250 *** Hello localhost [127.0.0.1]
250 Input accepted, please continue
550 Unrouteable address

Zitat

220 *** ESMTP Exim 4.80.1 Wed, 03 Sep 2014 20:23:46 +0200
250 *** Hello test [127.0.0.1]
550 Please use a fully-qualified domain name for HELO/EHLO
503 sender not yet given

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