<p>Assalamualaikum Wr. Wb.</p>
<p>Postingan kali ini akan membahas mengenai DKIM, DKIM merupakan signature yang menjadi pertanda bahwa email yang keluar dari email server sudah di sign dengan kode tertentu sesuai dengan nama domain tertentu sehingga dianggap sah dan meyakinkan bahwa email yang dikirim benar dari email server pengirim yang sah. Ref : <a href="https://en.wikipedia.org/wiki/DomainKeys_Identified_Mail" target="_blank" rel="noopener">https://en.wikipedia.org/wiki/DomainKeys_Identified_Mail</a></p>
<p>Langsung saja kita masuk tahapan konfigurasi DKIM nya</p>
<h3><span style="color: #00ccff;">Install DKIM</span></h3>
<p>Pada Ubuntu, jalankan command berikut untuk installasi DKIM</p>
<pre>apt-get install opendkim opendkim-tools</pre>
<h3><span style="color: #00ccff;">Edit Config File OpenDKIM</span></h3>
<p>Silakan buka file /etc/opendkim.conf</p>
<p>Kemudian tambahkan baris berikut ini pada bagian bawah</p>
<pre>Domain rzpratama.tk 
KeyFile /etc/postfix/rzpratama.key 
Selector mail1 
SOCKET inet:8891@127.0.0.1</pre>
<p>Selanjutnya buka file <span class="s1">vi /etc/default/opendkim</span></p>
<p>Lalu tambahkan baris berikut ini untuk mendefinisikan socket DKIM yang digunakan</p>
<pre>SOCKET="inet:8891@127.0.0.1"</pre>
<h3><span style="color: #00ccff;">Edit Config File Postfix</span></h3>
<p>Silakan buka file /etc/postfix/main.cf</p>
<p>Kemudian tambahkan baris berikut di paling bawah</p>
<pre># DKIM 
milter_default_action = accept 
milter_protocol = 2 
smtpd_milters = inet:localhost:8891 
non_smtpd_milters = inet:localhost:8891</pre>
<h3><span style="color: #00ccff;">Generate DKIM</span></h3>
<p>Untuk generate DKIM, silakan sesuaikan dengan konfigurasi pada file /etc/opendkim.conf</p>
<pre>opendkim-genkey -t -s mail1 -d rzpratama.tk</pre>
<p>untuk -s mail1 dan -d rzpratama.tk di sesuaikan dengan konfigurasi pada file /etc/opendkim.conf</p>
<p>Setelah di generate nanti akan menghasilkan file mail1.txt dan mail1.private</p>
<p>Selanjutnya salin file mail1.private ke file yang di setup pada konfigurasi /etc/opendkim.conf</p>
<pre>cp mail1.private /etc/postfix/rzpratama.key</pre>
<p>Memasukkan DKIM Record pada DNS Publik</p>
<p>Silakan buka file mail1.txt hasil generate tadi, hasil nya seperti berikut</p>
<pre>mail1._domainkey	IN	TXT	( "v=DKIM1; k=rsa; t=y; " 
	 "p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDtSwePF5FFjsulR6SJG1oANiavD03sdsfFeiWJ+00ZeTO/04vXifBUFCKnmkIw7+mW/mtPt54bI+r1By4tj4axHZ66MCHdgYQWfxB6OQj1BQ8JXx/0PLgqA++zocXELJU2sJxk+4QvOR9q+dPdWQWoIOpApU9nTlM4jCWxhafF9QIDAQAB" ) ; ----- DKIM key mail1 for rzpratama.tk</pre>
<p>Kemudian silakan tambahkan TXT Record dengan nama mail1._domainkey.rzpratama.tk. pada cPanel DNS, kemudian pada isian value silakan diisi dimulai dari v=DKIM1, jangan lupa untuk menghilangkan tanda kutip setelah t=y;</p>
<p><img data-attachment-id="276" data-permalink="https://rizkypratama.id/blog/2017/08/15/konfigurasi-dkim-pada-postfix-ubuntu/screen-shot-2017-08-15-at-3-40-32-pm/" data-orig-file="https://i0.wp.com/rizkypratama.id/wp-content/uploads/2017/08/Screen-Shot-2017-08-15-at-3.40.32-PM.png?fit=730%2C90&;ssl=1" data-orig-size="730,90" data-comments-opened="1" data-image-meta="{";aperture";:";0";,";credit";:";";,";camera";:";";,";caption";:";";,";created_timestamp";:";0";,";copyright";:";";,";focal_length";:";0";,";iso";:";0";,";shutter_speed";:";0";,";title";:";";,";orientation";:";0";}" data-image-title="Screen Shot 2017-08-15 at 3.40.32 PM" data-image-description="" data-image-caption="" data-medium-file="https://i0.wp.com/rizkypratama.id/wp-content/uploads/2017/08/Screen-Shot-2017-08-15-at-3.40.32-PM.png?fit=300%2C37&;ssl=1" data-large-file="https://i0.wp.com/rizkypratama.id/wp-content/uploads/2017/08/Screen-Shot-2017-08-15-at-3.40.32-PM.png?fit=730%2C90&;ssl=1" class="alignnone wp-image-276 size-full" src="https://rizkypratama.id/wp-content/uploads/2017/08/Screen-Shot-2017-08-15-at-3.40.32-PM.png" alt="" width="730" height="90" /></p>
<p>Jika sudah, silakan save record dan tunggu hingga propagasi DNS selesai, kira-kira membutuhkan waktu sekitar 5 menit sampat 2&#215;24 jam</p>
<p>Jika sudah selesai propagasi, silakan cek DKIM Record tersebut pada website <a href="http://dkimcore.org/tools/" target="_blank" rel="noopener">http://dkimcore.org/tools/</a></p>
<p>Seperti hasilnya jika DKIM key kita valid</p>
<p><img data-attachment-id="280" data-permalink="https://rizkypratama.id/blog/2017/08/15/konfigurasi-dkim-pada-postfix-ubuntu/screen-shot-2017-08-16-at-10-49-22-pm/" data-orig-file="https://i0.wp.com/rizkypratama.id/wp-content/uploads/2017/08/Screen-Shot-2017-08-16-at-10.49.22-PM.png?fit=1423%2C450&;ssl=1" data-orig-size="1423,450" data-comments-opened="1" data-image-meta="{";aperture";:";0";,";credit";:";";,";camera";:";";,";caption";:";";,";created_timestamp";:";0";,";copyright";:";";,";focal_length";:";0";,";iso";:";0";,";shutter_speed";:";0";,";title";:";";,";orientation";:";0";}" data-image-title="Screen Shot 2017-08-16 at 10.49.22 PM" data-image-description="" data-image-caption="" data-medium-file="https://i0.wp.com/rizkypratama.id/wp-content/uploads/2017/08/Screen-Shot-2017-08-16-at-10.49.22-PM.png?fit=300%2C95&;ssl=1" data-large-file="https://i0.wp.com/rizkypratama.id/wp-content/uploads/2017/08/Screen-Shot-2017-08-16-at-10.49.22-PM.png?fit=810%2C256&;ssl=1" class="alignnone wp-image-280 size-full" src="https://rizkypratama.id/wp-content/uploads/2017/08/Screen-Shot-2017-08-16-at-10.49.22-PM.png" alt="" width="1423" height="450" /></p>
<p>Mungkin sekian dlu, Semoga bermanfaat</p>
<div class="saboxplugin-wrap" itemtype="http://schema.org/Person" itemscope itemprop="author"><div class="saboxplugin-tab"><div class="saboxplugin-gravatar"><img src="https://rizkypratama.id/wp-content/uploads/2020/09/My-Photos.jpg" width="100" height="100" alt="My Photos" itemprop="image"></div><div class="saboxplugin-authorname"><a href="https://rizkypratama.id/blog/author/rizky/" class="vcard author" rel="author"><span class="fn">Rizky Pratama</span></a></div><div class="saboxplugin-desc"><div itemprop="description"><p>Rizky Pratama. Tinggal di Bekasi, Jawa Barat. Seorang IT di salah satu perusahaan IT. Pengguna Mac, Linux dan Windows<br />
Selain sebagai penulis di blog ini, saya juga penulis di blog saya yang lain, yaitu <a href="https://pratama.biz.id" target="_blank" rel="noopener noreferrer">https://pratama.biz.id</a></p>
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