What are email addresses at the domain devnull.spamcop.net used for in SpamCop?

Question

I see a few different address in my SpamCop inprogress display:

• nomaster@devnull.spamcop.net
• abuse#anti-spam.cn@devnull.spamcop.net
• abuse#strato.de@devnull.spamcop.net
• sidhom#ati.tn@devnull.spamcop.net

What do these mean? That there was no abuse e-mail for these domains? Or, that the account didn't respond? Or, that the account was not accepting of e-mail? Any information on the email domain devnull.spamcop.net would probably satisfy my curiosity.

Answer 1

Apparently these address are either for statistical tracking within the SpamCop system:

Using abuse#anti-spam.cn@devnull.spamcop.net for statistical tracking.

Or in the case of nomaster@devnull.spamcop.net

No reporting addresses found for 130.255.251.212, using devnull for tracking.

No valid email addresses found, sorry!