If your app sends email — transactional or marketing — three DNS records decide whether it lands in the inbox or the spam folder: SPF , DKIM , and DMARC . Here's how to look them up and sanity-check them in Python, no third-party API required. Install the one dependency: pip install dnspython S...
Source: [Dev.to](https://dev.to/devyjones/how-to-check-spf-dkim-and-dmarc-records-in-python-143)