Check if exim is compiled with DKIM support enabled.
root@server # /usr/sbin/exim -dd 2>&1 | grep Experimental_DKIMSupport for: crypteq iconv() IPv6 PAM Perl OpenSSL Content_Scanning Old_Demime Experimental_SPF Experimental_SRS |
Generate the SSL keys.
1 | cd /usr/local/cpanel/etc/exim |
openssl genrsa -out dkim.key 1024
openssl rsa -in dkim.key -out dkim.public -pubout -outform PEM
|
You will find two keys, dkim.key & dkim.public
Open dkim.public and copy the contents excluding the –Begin– and –End– section. This is your DKIM key. Now open exim configuration file and append the below entries under the section ‘remote_smtp’
Sample exim.conf file
remote_smtp: |
driver = smtp |
dkim_domain=your_domain_name.com |
dkim_selector=mail |
dkim_private_key=/usr/local/cpanel/etc/exim/dkim.key#path to the dkim.key key. |
interface = ${if exists {/etc/mailips}{${lookup{$sender_address_domain}lsearch*
|
helo_data = ${if exists {/etc/mailhelo}{${lookup{$sender_address_domain}lsearch*
|
{$primary_hostname}} |
In WHM, open DNS editor for the particular domain and add the TXT entry with DKIM key like below.
mail._domainkey.rosesource.com. IN TXT "v=DKIM1; g=*; k=r
|
Here p=the_key_you_have_copied_from_dkim.public
Then restart exim and named.
You can check it using the site https://.brandonchecketts.com/emailtest.php.
Also there is an option in cpanel > Email Authentication > DKIM Keys
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