Hallo lauras,
anscheinend gibt es doch eine Möglichkeit ein Email auf ihre Existenz zu überprüfen.
Folgenden Code habe ich im Internet gefunden:
<span class="syntaxdefault"><?php<br />function CheckEmail</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$email</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">{</span><span class="syntaxdefault"> list</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$user</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> $domain</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> split</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"@"</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> $email</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> 2</span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> getmxrr</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$domain</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> $mxlist</span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> $return </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> array</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">false</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> </span><span class="syntaxstring">"No email."</span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> foreach</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$mxlist as $mx</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault"> </span><span class="syntaxkeyword">{<br /></span><span class="syntaxdefault"> $fp </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> fsockopen</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$mx</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> 25</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> $errno</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> $errstr</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> 20</span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> if</span><span class="syntaxkeyword">(!</span><span class="syntaxdefault">$fp</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> continue</span><span class="syntaxkeyword">;<br /></span><span class="syntaxdefault"> socket_set_blocking</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$fp</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> false</span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> $s </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> 0</span><span class="syntaxkeyword">;<br /></span><span class="syntaxdefault"> $c </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> 0</span><span class="syntaxkeyword">;<br /></span><span class="syntaxdefault"> $out </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> </span><span class="syntaxstring">""</span><span class="syntaxkeyword">;<br /></span><span class="syntaxdefault"> do </span><span class="syntaxkeyword">{<br /></span><span class="syntaxdefault"> $out </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> fgets</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$fp</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> 2500</span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> if</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">ereg</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"^220"</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> $out</span><span class="syntaxkeyword">))</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">{<br /></span><span class="syntaxdefault"> $s </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> 0</span><span class="syntaxkeyword">;<br /></span><span class="syntaxdefault"> $out </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> </span><span class="syntaxstring">""</span><span class="syntaxkeyword">;<br /></span><span class="syntaxdefault"> $c</span><span class="syntaxkeyword">++;<br /></span><span class="syntaxdefault"> </span><span class="syntaxkeyword">}</span><span class="syntaxdefault"> else<br /> </span><span class="syntaxkeyword">{<br /></span><span class="syntaxdefault"> if</span><span class="syntaxkeyword">((</span><span class="syntaxdefault">$c</span><span class="syntaxkeyword">></span><span class="syntaxdefault">0</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">&&</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$out</span><span class="syntaxkeyword">==</span><span class="syntaxstring">""</span><span class="syntaxkeyword">))</span><span class="syntaxdefault"> break</span><span class="syntaxkeyword">;<br /></span><span class="syntaxdefault"> else $s</span><span class="syntaxkeyword">++;<br /></span><span class="syntaxdefault"> </span><span class="syntaxkeyword">}<br /></span><span class="syntaxdefault"> if</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$s</span><span class="syntaxkeyword">==</span><span class="syntaxdefault">9999</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> break</span><span class="syntaxkeyword">;<br /></span><span class="syntaxdefault"> </span><span class="syntaxkeyword">}<br /></span><span class="syntaxdefault"> while</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$out</span><span class="syntaxkeyword">==</span><span class="syntaxstring">""</span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> socket_set_blocking</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$fp</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> true</span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> fputs</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$fp</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> </span><span class="syntaxstring">"HELO\n"</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> $out </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> fgets</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$fp</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> 3000</span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> fputs</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$fp</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> </span><span class="syntaxstring">"MAIL FROM: user@news-user.com\n"</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> $out </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> fgets</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$fp</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> 3000</span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> fputs</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$fp</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> </span><span class="syntaxstring">"RCPT TO: $email\n"</span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> $out </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> fgets</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$fp</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> 3000</span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> if</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">ereg</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"^250"</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> $out</span><span class="syntaxkeyword">))<br /></span><span class="syntaxdefault"> </span><span class="syntaxkeyword">{<br /></span><span class="syntaxdefault"> $return </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> array</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">true</span><span class="syntaxkeyword">,</span><span class="syntaxdefault">$out</span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> </span><span class="syntaxkeyword">}</span><span class="syntaxdefault"> else<br /> </span><span class="syntaxkeyword">{<br /></span><span class="syntaxdefault"> $return </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> array</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">false</span><span class="syntaxkeyword">,</span><span class="syntaxdefault">$out</span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> </span><span class="syntaxkeyword">}<br /></span><span class="syntaxdefault"> fputs</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$fp</span><span class="syntaxkeyword">,</span><span class="syntaxdefault"> </span><span class="syntaxstring">"quit\n"</span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> fclose</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$fp</span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> if</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$return</span><span class="syntaxkeyword">[</span><span class="syntaxdefault">0</span><span class="syntaxkeyword">])</span><span class="syntaxdefault"> break</span><span class="syntaxkeyword">;<br /></span><span class="syntaxdefault"> </span><span class="syntaxkeyword">}<br /></span><span class="syntaxdefault"> return $return</span><span class="syntaxkeyword">;<br /></span><span class="syntaxdefault"> </span><span class="syntaxkeyword">}<br /></span><span class="syntaxdefault"> $ret </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> CheckEMail</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"user@news-user.com"</span><span class="syntaxkeyword">);<br /></span><span class="syntaxdefault"> echo</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">$ret</span><span class="syntaxkeyword">[</span><span class="syntaxdefault">0</span><span class="syntaxkeyword">].</span><span class="syntaxstring">" "</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">$ret</span><span class="syntaxkeyword">[</span><span class="syntaxdefault">1</span><span class="syntaxkeyword">]);<br /><br /></span><span class="syntaxdefault">?></span>
Dieser Code ist in Arbeit.
Lg.
:wink: adolpho