I have accepted as postdoc researcher in a Swedish university. Three professors in the university are correspondent for this position. I have to travel to Sweden within 2 weeks and start my new job. However, I should make sure about some issue before leaving my homeland. They all are so quick in answering. However, I sent them a short e-mail but did not receive any reply from 10 days ago. I don’t know what I should do. Does such a behavior mean “No”? Or am I annoying them because of my e-mail?