Wikipedia:Tip of the day/July 24, 2006
Forums and e-mails are not acceptable sources
Internet forums and e-mails are not considered reliable sources and should not be used as sources for references in Wikipedia articles. They can however be included as external links. What's the difference? A source or reference is cited to verify the facts in the article. External links point to locations outside of Wikipedia where users can learn more about the subject, or where to see an example of what the article is about.
Read more: Wikipedia:Reliable sources
See also: Wikipedia:Verifiability