From Scribus Wiki
When registering at Scribus Forums keep the following in mind:
- It's important to keep Scribus lists and forums spam-free, so we're using multiple spam protection databases to that purpose, which sometimes give false positives. If you register and don't get a registration confirmation email within a day - write to the forums administrators. It's likely that your email address, chosen nick, name, or the IP address were flagged by the spam protection system. Once you write to us we'll manually approve your account without any further delay.