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Knowledge base
Configuring DKIM Signing of e-mails
DKIM (DomainKeys Identified Mail) is one of existing ways to authenticate email messages. If the email contains a DKIM digital signature, the sender is set to high reliability.
This authentication is used to avoid the possibility of finding your server’s IP-address black listed on mail servers.
Run the following setup via the ISPmanager control panel for adding DKIM to your domain.
In ISPmanager, go to «Settings» — «Software configuration», select «Mail Server...» and click the «Edit» button.
![](https://ispserver.ru/sites/default/files/kcfinder/images/help/dkim/dkim6.png)
Check the «OpenDKIM (exim)» box and click on «Apply Changes».
![](https://ispserver.ru/sites/default/files/kcfinder/images/help/dkim/dkim77.png)
Then go to the «Mail» section — the «Mail domains» button — select a domain and click «Edit».
![](https://ispserver.ru/sites/default/files/kcfinder/images/help/dkim/dkim8.png)
Check the box next to «Enable DKIM for domain» and click Ok.
![](https://ispserver.ru/sites/default/files/kcfinder/images/help/dkim/dkim9.png)
DKIM records will be added to the domain resource records, you can check their presence in the «DNS Management» section - the «Manage DNS records» button.
![](https://ispserver.ru/sites/default/files/kcfinder/images/help/dkim/dkim10.png)
Verify that the settings are in effect and emails now have a DKIM signature. Send an email from your email address to any external email inbox that you can access (your alternate e-mail). Check the «Inbox», open the received email and review the headers. Make sure the «DKIM-Signature:» heading is among them — this is the DKIM signature.