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What tracking and sending domains actually are?

If you have MailWizz installed on and you send campaigns, all your url links will start with and this is fine for most of the cases, but what if you want to handle emailing for domain?
In this case, you will have to either install MailWizz in a subdomain for domain like or you can still use the install from but use a tracking domain for domain.

A tracking domain is simply a CNAME(DNS Record).
In our case, we define a cname for domain, namely that will point to subdomain.
Once we do this, propagation can take up to 48 hours, so after 48 hours, we can go in the backend of MailWizz website and add a new tracking domain, the domain. Once we did this, to check if everything works properly, we have to access and we should get same page that we get when accessing If it’s not showing same page, then you don’t use a dedicated ip address for domain and you should.
Now, our tracking domain is in place, all we have to do si to associate it with a delivery server and all emails that will be sent via that delivery server will change all the links from into

You should use sending domains only if your delivery servers do not sign your emails with DKIM, because the only purpose of sending domains is to identify the domain from the “FROM” or “Return-Path” of your headers and generate a dkim signature for them.
Like in the above case, if your domain is and you send emails from, then you can add a sending domain ( for which MailWizz will generate the dkim records (you have to add the public key into your dns records, as a TXT record).
Once the domain is confirmed, each time when MailWizz finds an email that contains the domain in it’s FROM/Return-Path headers it will append the right DKIM signature.

Note: If you are using CloudFlare or a similar service make sure you change the DNS records from the proper place.