I am running xenforo 1.1.3. Last week-end, a spammer registered for the first time since 9 months successfully on one of my sites and posted one spam message only.
Now I doublechecked in the ACP the domainname of his email address and found out that aroud 16 other users with rediffmail.com as donain domain name were able to register successfully. But none of them show an IP Address in the ACP .
Is this normal or is this a sign that all these are spammers?