Claws-Mail fails to connect to my mail acct. at mail.snowcrest.net
You are going to need to provide a lot more info than that. Some general information here: http://www.thewildbeast.co.uk/claws-mail/bugzilla/page.cgi?id=bug-writing.html But you need to add some specific information, e.g. your account settings, what the network log reports when you encounter this behaviour (/Tools/Network Log), and so on.
Feel free to reopen with more info, as requested.