Senderbase and the Email RFC ignorants

Searching a known portuguese domain at Senderbase, from Ironport, I found a reference to the "RFC Ignorant org". I thought it was odd, because this domain belongs to one of the most seen TV stations on Portugal.
So, the commands by order:

• gnetinfo http://www.senderbase.org/senderbase_queries/detaildomain?search_string=mail.sic.pt
  
• dig mx sic.pt (resulted in mail.sic.pt)
  
• gmailkind exercise -v -v --test-from legitimate_sender@known_domain --test-rcpt abuse@sic.pt -v mail.sic.pt (resulted in SMTP 550 response, which violates SMTP RFC)
  

Basically the "abuse" address part must be accepted for a given domain, in the spirit of Section 4 of RFC2142.
The story for this: rfc-ignorant.org

You can use the "Ignorant" lists as you like, as a postmaster / mail administrator.
Currently I do not know what being listed at the RFC ignorant might mean, but I can learn.

Hint: DNSing example.tld.dsn.rfc-ignorant.org will provide you the status of the domain.