title: Action Mailer not working with sendmail
body: <p>I'm trying to send a mail with sendmail. When sending the mail, I don´t get any errors in the logs, but when I look into my mailbox, the mail isn´t there, not even in the spam folder. 
  I get some infos in the mail.log file from my var/log directory, but can´t really figure out, what I have to change, to get it working.</p>
  
  <p>Here´s my development.rb part: </p>
  
  <pre><code>config.action_mailer.delivery_method = :sendmail
  config.action_mailer.raise_delivery_errors = true
  </code></pre>
  
  <p>I tried with two different addresses and got different messages:
  this is from my mail.log:</p>
  
  <pre><code>Feb 16 13:55:22 localhost postfix/master[2821]: daemon started -- version 2.8.4, configuration /etc/postfix  
  Feb 16 13:55:22 localhost postfix/pickup[2822]: 5E1C6CB8C1: uid=501 from=&lt;fhu@informatik.uni-kiel.de&gt;  
  Feb 16 13:55:22 localhost postfix/cleanup[2824]: 5E1C6CB8C1: message-id=&lt;4f3cfcba50ccf_ac695d96210305e1@localhost.mail&gt;  
  Feb 16 13:55:22 localhost postfix/qmgr[2823]: 5E1C6CB8C1: from=&lt;fhu@informatik.uni-kiel.de&gt;, size=882, nrcpt=1 (queue active)  
  Feb 16 13:55:27 localhost postfix/smtp[2826]: 5E1C6CB8C1: to=&lt;mkh@informatik.uni-kiel.de&gt;, relay=miraculix.informatik.uni-kiel.de[134.245.248.198]:25, delay=5.3, delays=0.04/0.01/5.3/0.04, dsn=5.7.1, status=bounced (host miraculix.informatik.uni-kiel.de[134.245.248.198] said: 550 5.7.1 HELO localhost.localhost from RFC 2606 reserved domains blocked (in reply to MAIL FROM command))  
  Feb 16 13:55:27 localhost postfix/cleanup[2824]: C0D2ACB8CB: message-id=&lt;20120216125527.C0D2ACB8CB@localhost.localhost&gt;  
  Feb 16 13:55:27 localhost postfix/bounce[2829]: 5E1C6CB8C1: sender non-delivery notification: C0D2ACB8CB  
  Feb 16 13:55:27 localhost postfix/qmgr[2823]: C0D2ACB8CB: from=&lt;&gt;, size=2932, nrcpt=1 (queue active)  
  Feb 16 13:55:27 localhost postfix/qmgr[2823]: 5E1C6CB8C1: removed  
  Feb 16 13:55:33 localhost postfix/smtp[2826]: C0D2ACB8CB: to=&lt;fhu@informatik.uni-kiel.de&gt;, relay=miraculix.informatik.uni-kiel.de[134.245.248.198]:25, delay=5.2, delays=0/0/5.2/0.04, dsn=5.7.1, status=bounced (host miraculix.informatik.uni-kiel.de[134.245.248.198] said: 550 5.7.1 HELO localhost.localhost from RFC 2606 reserved domains blocked (in reply to MAIL FROM command))  
  Feb 16 13:55:33 localhost postfix/qmgr[2823]: C0D2ACB8CB: removed  
  </code></pre>
  
  <p>second adress:</p>
  
  <pre><code>Feb 16 13:56:22 localhost postfix/master[2821]: master exit time has arrived  
  Feb 16 13:58:30 localhost postfix/master[2835]: daemon started -- version 2.8.4, configuration /etc/postfix  
  Feb 16 13:58:30 localhost postfix/pickup[2836]: 91FFCCB947: uid=501 from=&lt;xxx@informatik.uni-kiel.de&gt;  
  Feb 16 13:58:30 localhost postfix/cleanup[2838]: 91FFCCB947: message-id=&lt;4f3cfd7684947_ac695dc9a5c306de@localhost.mail&gt;  
  Feb 16 13:58:30 localhost postfix/qmgr[2837]: 91FFCCB947: from=&lt;xxx@informatik.uni-kiel.de&gt;, size=878, nrcpt=1 (queue active)  
  Feb 16 13:58:30 localhost postfix/smtp[2840]: connect to mx.freenet.de[2001:748:100:40::8:110]:25: No route to host  
  Feb 16 13:58:30 localhost postfix/smtp[2840]: connect to mx.freenet.de[2001:748:100:40::8:112]:25: No route to host  
  Feb 16 13:58:30 localhost postfix/smtp[2840]: connect to mx.freenet.de[2001:748:100:40::8:111]:25: No route to host  
  Feb 16 13:58:30 localhost postfix/smtp[2840]: 91FFCCB947: to=&lt;xxx@freenet.de&gt;, relay=mx.freenet.de[195.4.92.9]:25, delay=0.32, delays=0.04/0.01/0.23/0.04, dsn=5.0.0, status=bounced (host mx.freenet.de[195.4.92.9] said: 550 Submission from dynamic IP 82.83.107.102 requires authentication (in reply to RCPT TO command))  
  Feb 16 13:58:30 localhost postfix/cleanup[2838]: DF128CB94C: message-id=&lt;20120216125830.DF128CB94C@localhost.localhost&gt;  
  Feb 16 13:58:30 localhost postfix/bounce[2843]: 91FFCCB947: sender non-delivery notification: DF128CB94C  
  Feb 16 13:58:30 localhost postfix/qmgr[2837]: DF128CB94C: from=&lt;&gt;, size=2864, nrcpt=1 (queue active)  
  Feb 16 13:58:30 localhost postfix/qmgr[2837]: 91FFCCB947: removed  
  Feb 16 13:58:36 localhost postfix/smtp[2840]: DF128CB94C: to=&lt;xxx@informatik.uni-kiel.de&gt;, relay=miraculix.informatik.uni-kiel.de[134.245.248.198]:25, delay=5.3, delays=0/0/5.3/0.04, dsn=5.7.1, status=bounced (host miraculix.informatik.uni-kiel.de[134.245.248.198] said: 550 5.7.1 HELO localhost.localhost from RFC 2606 reserved domains blocked (in reply to MAIL FROM command))  
  Feb 16 13:58:36 localhost postfix/qmgr[2837]: DF128CB94C: removed  
  ~              
  </code></pre>
  
  <p>In my user_mailer.rb I have this:</p>
  
  <pre><code>default :from =&gt; "xxx@informatik.uni-kiel.de"
  </code></pre>
  
  <p>Also I tried </p>
  
  <pre><code>config.action_mailer.sendmail_settings = 
      { :arguments =&gt; '-i -t -f xxx@informatik.uni-kiel.de'}
  </code></pre>
  
  <p>then the mail.log still looks like this:</p>
  
  <pre><code>Feb 16 14:54:57 localhost postfix/master[2893]: daemon started -- version 2.8.4, configuration /etc/postfix  
  Feb 16 14:54:57 localhost postfix/qmgr[2895]: 9DBF4CB857: from=&lt;xxx@informatik.uni-kiel.de&gt;, size=859, nrcpt=1 (queue active)
  Feb 16 14:54:58 localhost postfix/pickup[2894]: A3120CC90B: uid=501 from=&lt;xxx@informatik.uni-kiel.de&gt;  
  Feb 16 14:54:58 localhost postfix/cleanup[2896]: A3120CC90B: message-id=&lt;4f3d0ab19405d_b4999f2bd74125b1@localhost.mail&gt;  
  Feb 16 14:54:58 localhost postfix/qmgr[2895]: A3120CC90B: from=&lt;xxx@informatik.uni-kiel.de&gt;, size=880, nrcpt=1 (queue active)  
  Feb 16 14:54:58 localhost postfix/smtp[2906]: connect to mx.freenet.de[2001:748:100:40::8:111]:25: No route to host  
  Feb 16 14:54:58 localhost postfix/smtp[2906]: connect to mx.freenet.de[2001:748:100:40::8:112]:25: No route to host  
  Feb 16 14:54:58 localhost postfix/smtp[2906]: connect to mx.freenet.de[2001:748:100:40::8:110]:25: No route to host  
  Feb 16 14:54:58 localhost postfix/smtp[2906]: A3120CC90B: to=&lt;xxx@freenet.de&gt;, relay=mx.freenet.de[195.4.92.212]:25, delay=1.3, delays=1/0.01/0.17/0.05, dsn=5.0.0, status=bounced (host mx.freenet.de[195.4.92.212] said: 550 Submission from dynamic IP 82.83.107.102 requires authentication (in reply to RCPT TO command))  
  Feb 16 14:54:58 localhost postfix/cleanup[2896]: E3597CC90F: message-id=&lt;20120216135458.E3597CC90F@localhost.localhost&gt;  
  Feb 16 14:54:58 localhost postfix/qmgr[2895]: E3597CC90F: from=&lt;&gt;, size=2868, nrcpt=1 (queue active)  
  Feb 16 14:54:58 localhost postfix/bounce[2907]: A3120CC90B: sender non-delivery notification: E3597CC90F  
  Feb 16 14:54:58 localhost postfix/qmgr[2895]: A3120CC90B: removed  
  ~                                                                            
  </code></pre>
  
  <p>I tried to telnet mx.freenet.de 25 and got a connection. I would really appreciate any help.</p>
  
  <p>Thanks!         </p>