Your error says SSL negotiation failed. This could be for a number of reasons...
First thing I notice is that you are using port 110. This is the default unencrypted (non-SSL port) for POP.
POP usually uses port 995 for SSL traffic.
Since we do not know what your mailserver is, or how it is configured, or if ts self hosted of hosted with someone else it's hard to know if these settings are correct.
