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<oembed><type>rich</type><version>1.0</version><provider_name>phorkie</provider_name><provider_url>https://p.cweiske.de/</provider_url><title>postfix: 550 TLS encryption required for mails from xxx (in reply to RCPT TO command)</title><author_name>Christian Weiske</author_name><cache_age>86400</cache_age><width>900</width><height>900</height><html>&lt;!-- embedding all files of https://p.cweiske.de/749 --&gt;
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&lt;p&gt;Error mail:&lt;/p&gt;
&lt;blockquote&gt;
&lt;p&gt;The mail system&lt;/p&gt;
&lt;dl class="docutils"&gt;
&lt;dt&gt;&amp;lt;&lt;a class="reference external" href="mailto:phishing&amp;#64;verbraucherzentrale.nrw"&gt;phishing&amp;#64;verbraucherzentrale.nrw&lt;/a&gt;&amp;gt;: host mail.vz-nrw.de[195.8.243.17] said: 550&lt;/dt&gt;
&lt;dd&gt;TLS encryption required for mails from 83.169.45.222 (in reply to RCPT TO
command)&lt;/dd&gt;
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&lt;/blockquote&gt;
&lt;p&gt;Solution: Set smtp_tls_security_level (&lt;a class="reference external" href="http://www.postfix.org/postconf.5.html#smtp_tls_security_level"&gt;http://www.postfix.org/postconf.5.html#smtp_tls_security_level&lt;/a&gt;)&lt;/p&gt;
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