Update outdated plaintext configurations for Nifty, PeoplePC, and Goo Mail #177

Hi,

I identified three providers in the ISPDB (Nifty, PeoplePC, Goo Mail) that are currently configured to use outdated plaintext settings. However, my analysis shows that these providers actually support encryption (SSL or STARTTLS).

Keeping these configurations in plaintext exposes users to insecure transfer.

Here are the details and official references for the correct settings:

• Nifty.com: Official Setup Guide

• PeoplePC (acquired by EarthLink): Official Email Server Settings

• Goo Mail: Official How-to.

Suggestion: Beyond fixing these specific entries, I suggest implementing a validation tool or CI check to verify that submitted configurations prioritize encrypted connections whenever available.