[轉貼]Postfix blacklist or reject an email address
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<h1 class="entry-title">Postfix blacklist or reject an email address</h1>
<p class="headline_meta">by <span class="author vcard fn">Vivek Gite</span> on <abbr class="published" title="2007-07-04">July 4, 2007</abbr> · <span><a href="http://www.cyberciti.biz/faq/howto-blacklist-reject-sender-email-address/#comments" rel="nofollow">14 comments</a></span></p>
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<p><strong><span style="color: rgb(255, 0, 0);">Q</span></strong>. I’ve
Postfix based CentOS Linux server. I need to blacklist email ID:
user@abadboy.com . How do I blacklist email address with postfix? I also
have spamassassin software installed.</p>
<p><strong><span style="color: rgb(0, 153, 0);">A</span></strong>.
By default, the Postfix SMTP server accepts any sender address. However
you can block / blacklist sender email address easily with Postfix. It
has SMTP server access table. </p>
<p>Open /etc/postfix/sender_access file<br>
<code># cd /etc/postfix<br>
# vi sender_access </code><br>
Append sender email id as follows:<br>
<code>user@abadboy.com REJECT</code><br>
Save and close the file. Use postmap command to create a database:<br>
<code># postmap hash:sender_access </code><br>
Now open main.cf and add code as follows:<br>
<code>smtpd_recipient_restrictions = check_sender_access hash:/etc/postfix/sender_access</code><br>
Save and close the file. Restart / reload postfix MTA:<br>
<code># /etc/init.d/postfix restart</code></p>
<p>You can also use spamassassin to blacklist email address. Just add to
your own spamassassin configuration or to
/etc/mail/spamassassin/local.cf file:<br>
<code># vi /etc/mail/spamassassin/local.cf</code><br>
Append blacklist as follows:<br>
<code>blacklist_from user@abadboy.com</code><br>
Save and close the file. Restart spamassassin:<br>
<code># /etc/init.d/spamassassin restart</code></p>
<p>spamassassin will marke mail as SPAM instead of rejecting the same.</p>
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