Support underscore creation in domain for NS records
Support underscore for DNS record creation, e.g.,
add NS records for default._domainkey.example.com
Thank you for your input. We will consider this functionality in upcoming releases if it is popular. Everyone, please continue voting for this feature if you consider it important. 
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IG
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Heiko Schrörs commented
I cannot understand why this error still exists. It is now not only popular, but a must-have for dramatically increasing email security through DKIM and DMARC.
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Maffert
    
 commented
    
  Hello? Any Updates?
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Maffert
    
 commented
    
  Any Updates here? We are getting more and more requests from customers regarding the setting of _ entries. An example NS entry: _domainkey > ns1.hornetdmarc.com.
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Alexander Yamshanov
    
 commented
    
  Plesk Automation has reached "End of Life" and "End of Support" status on January 1st, 2018, meaning the product will no longer undergo further development and will no longer accept technical support requests.
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Anonymous
    
 commented
    
  When you try to add a CNAME record with underscore ("_") in the begining of it (usually for DKIM records), you receive an error message, telling that non-latin characters are not allow.