The right place to look for is http://www.debian.org/MailingLists/, but some words in advance, especially targetted at the new user.

 The probably most frequented mailing-list for help is debian-user. However, 

this list features up to 300 (threehundred, yes!) mails per day. For people on a slow connection, this probably presents a heavy impact so those might wish to read the list online at http://lists.debian.org . Currently (2002-03-16) that list is unmoderated, meaning that you can post without being subscribed.

Please keep in mind that

- Help is voluntary, people help you in their free time and there is no reason to be angry at them if they can't help you

- Use normal behaviour for mailing-lists: no html, no h4x0r sp34k, no big attachments (larger than 10kiB), don't flame or troll. Other useful tidbits would include: use ?PostFix (aka ?AntiJeopardy) response format -- answer follows question, and, to a reasonable extent, try to use standard grammar and spelling. Set your linewrap to something reasonably -- most authorities give 65-78 characters, 72 is a very popular setting. Flow quoted text if possible ("qv}" in <tt>vim</tt>). Use a standard prefix character. That's '> ' or '>'. Other notations are likely to foul up someone's quoting or wrapping. Attribute quotes, and do so accurately. Why all these rules? There are some hardworking people who put a lot of time into monitoring and responding to the lists. Clearly stating your issue helps them help you.

- Use a descriptive subject-line (subject 'help' is useless and likely to be ignored, if not deleted outright). This is not easy, especially if you have no clue where the problem might be hidden. Don't use something like "I need help setting up X with Debian GNU/Linux". That you need help is assumed, ditto that this is a Debian issue. Instead, maximize your use of ?MicroContent with the concise, descriptive "setting up X 4.1 with Matrox G550".

- It should go without saying, but the Debian lists are for discussion of Debian issues. Discussion of other distros, or other operating systems, unless related to a Debian issue, is off topic.

- Keep the discussions on the list so others can benefit from it, too, don't make it a private conversation with the author.

- Use the 'reply' function of your mail-program. That (usually) makes sure a reference to the original message is included, giving the others better means to associate the reply with the question. If you don't have a list reply function, trim Cc:'s, as many listmembers prefer not getting two copies of list mail.