If your app sends email — transactional or marketing — three DNS records decide whether it lands in...
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
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