Implement Robust Disposable Email Address Validation

[relandboyle]

Acceptance Criteria

• In authSchema.ts - currently there is a Zod validator to ensure a valid email address is entered when creating a new account.
• The validator checks the email domain against a list of three known disposable domains.
• Upgrade this behavior to use an library which checks against a maintained library of disposable or otherwise undesirable domains.

via ChatGPT:

Here are some popular NPM packages you can use to identify suspicious or blacklisted domains for purposes like preventing them from being used to create accounts:

1. **email-verifier**  
   This package verifies email addresses and checks for disposable email providers, blacklisted domains, or invalid addresses.
   - [GitHub Repository](https://github.com/AfterShip/email-verifier)
   - Install: `npm install email-verifier`

2. **email-domain-validator**  
   A package that checks if the domain of an email address is a free or disposable email provider. It's useful for filtering blacklisted or suspicious domains.
   - Install: `npm install email-domain-validator`

3. **validate-email-domain**  
   Validates if an email’s domain is blacklisted or belongs to known disposable email providers.
   - [GitHub Repository](https://github.com/apideck-libraries/validate-email-domain)
   - Install: `npm install validate-email-domain`

4. **is-disposable-email**  
   This package checks whether an email is disposable or from a throwaway email provider, using a frequently updated list.
   - [GitHub Repository](https://github.com/ivolo/disposable-email-domains)
   - Install: `npm install is-disposable-email`

5. **blacklist-checker**  
   A package that checks if a domain or IP address is blacklisted on popular blacklists like Spamhaus or Barracuda.
   - Install: `npm install blacklist-checker`

6. **spam-email-checker**  
   This package checks whether an email address is from a free provider, disposable, or a blacklisted domain.
   - Install: `npm install spam-email-checker`

7. **block-disposable-email**  
   Another NPM package that helps to block disposable or temporary email domains.
   - Install: `npm install block-disposable-email`

These packages can help you create checks to prevent accounts from being created with suspicious or blacklisted email domains.