update suffix file method added

[barankaynak]

In the receiver_policy method when should we run update method? An algorithm is required to determine when to update file.

[mpj17]

I love the intention @barankaynak but I have some questions.

1. Is this the best module for this code?
2. Is urllib the best choice? Using requests would be safer.
3. Is rewriting the data shipped with the package a good idea?

Maybe it would be best to tackle the question you asked first? How about updating the list using a cron-job?

• A script downloads the suffix-list to /tmp/gs-dmarc-suffixlist.txt
• When determining the organisational domain receiver_policy looks up
  • The tmp-file first, and
  • Falls back to the suffix list shipped with the package.

[mpj17]

[Mostly for my own benefit]

It is possible to make a console_script depend on an extra.