Different types of caching on MX record lookup

[lulalala]

So I have my own gem for doing lookups.
The thing about MX-record lookup is that it is not very fast,
so my gem offers many levels of caching,
including whitelist, rails_cache store, etc.

https://github.com/lulalala/email_domain_validator#filters

These are implemented so one filter can wrap around another filter, making the whole thing very configurable.

I am wondering if you are interested in either:

1. use my gem for lookup and utilize those filters.
2. copy the code in my gem for similar caching capabilities.