I created a tumblr blog for my website. And I want to host it on blog.mywebsite.com subdomain. Tumblr says that I should add CNAME instead of A Records to domains.tumblr.com. But the problem is that the Plesk Control Panel is showing this error when I add a CNAME:
Following are my DNS records:
Please tell me what is wrong with my records?
It looks like blog.example.com is a zone of its own, which appears to be one of the reasons why the instructions do not work in your case.
The problem here is that a CNAME record is not allowed to coexist with other records and at the zone apex there must be at least SOA and NS records (in your case you also have MX, TXT and A records).
Only if blog.example.com could be a part of the example.com zone AND the other records that currently exist at blog.example.com are not actually necessary you could do as the instructions say and add that CNAME record.
If, however, blog.example.com has to be a zone of its own or if you need to have the MX or TXT records for it, then a CNAME record is not an option for you.
In that case you may want to look into DNS hosting that has aliasing functionality, where you can set it up so that they behind the scenes regularly look up A and AAAA for a specified name and publishes that into your zone as the original record type (A/AAAA).
