Therefore, an SPF-protected domain is less attractive to spammers and phishers. Misspelled URLs or the use of subdomains are common tricks used by phishers. Moreover, it can serve as a good tool for spotting fake messages or phishers. Abad discovered that phishers were using IRC channels in order to trade personal information. He stalked and collected messages from thirteen chat rooms phishers use. Other countries have followed this lead by tracing and arresting phishers.