For general "How do I?" type questions:
The quickest way to get an answer to general questions about the site would be either stopping by our the #derpibooru-help channel on irc.ponychat.net (web client available here), or making a post in theSite and Policy Forum.
For feature suggestions and bug reports:
To suggest a feature be added or modified on the booru, please make a post in the Feature Suggestions thread. For bug reports that do not affect site security, please make a post in the Bug Reports thread. For bugs that you believe may have an impact on site security or privacy, please contact firstname.lastname@example.org.
If you receive a "You've been banned" message:
If you believe you've been banned in error, please stop by the #derpibooru-help channel on irc.ponychat.net (web client available here), or send an email to email@example.com. When contacting us, please be sure to let us know what your Ban ID is; we will be unable to help you without knowing this.
To report suspected rule violations:
All images, comments, and user profiles have a dedicated report link or button. Please use that to report any suspected rule violations, and a site moderator will look into it promptly.
For image takedown and do-not-post requests (excluding legal notices):
Please review our takedown policy and follow the instructions listed to request a takedown or DNP.
For legal notices, concerns regarding site staff, and advertising:
Please contact firstname.lastname@example.org.
If you have a legal claim to content hosted on this site and would like it removed, you may send us a DMCA notice if you wish. However, we strongly recommend you pursue having such content removed via our takedown policy first, as this is a faster and easier method, and we always respect copyright.