Following are some reasons for the BigPond email sign in error:
- Incorrect Password
- Incorrect Email ID
- Slow internet connection
- Hacked account
Hence, we have now seen various troubleshooting key points. If these are some points that you might think can be causing trouble then fix it immediately and if not then look up to the official website of BigPond and take help from their page.
See also - http://getassist-net.website2.me/blog/what-happened-to-my-bigpond-email