What Are 502 Max Connections Reached Errors?
These errors are a result of your newsreader trying to utilize too many connections to the news server in a short amount of time. If you are connecting and disconnecting to the server several times then you may see 502 errors because the server thinks that you are trying to use all of those connections at once. Make sure that your newsreader is configured to use no more than 20 connections simultaneously. You will need to wait approximately 15-30 minutes to be able to get back into the server.