If you still didn't find anything, post your question on the site where it's most on-topic. Use theformatting tools, especially for code, and add tags that are relatedto the substance of your question (particularly the name of theprogramming language, operating system, or library you're havingtrouble with). If a commenter asks you for more information, edit yourmain post to include it. If any answer is helpful, click the up arrowto upvote it; if an answer gives a solution to your problem, click thecheck under the voting arrows to accept it as correct.
Some Internet service providers and some system administrators limit the size of files you can send or receive by using their mail servers. In the case of problems where you work, the solution may be as simple as talking to the person in charge of your Internet access and asking for the limit to be changed. Your ISP might not be as accommodating.
Your followup doesn't have to be long and involved; a simple would be better than nothing. In fact, a short and sweetsummary is better than a long dissertation unless the solution hasreal technical depth. Say what action solved the problem, but youneed not replay the whole troubleshooting sequence.
For problems with some depth, it is appropriate to post asummary of the troubleshooting history. Describe your final problemstatement. Describe what worked as a solution, and indicate avoidableblind alleys . The blind alleys shouldcome after the correct solution and other summary material, ratherthan turning the follow-up into a detective story. Name the names ofpeople who helped you; you'll make friends that way.
Use tactics like doing a Google search on the text of whatevererror message you get (searching as well as Webpages). This might well take you straight to fix documentation or amailing list thread answering your question. Even if it doesn't,saying is a good thing to do in e-mailor news postings requesting help, if only because it records whatsearches won't help. It will also help to direct other people withsimilar problems to your thread by linking the search terms to whatwill hopefully be your problem and resolution thread.