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A healthy DMARC pass rate can hide a single-leg dependency: decompose it into SPF-aligned and DKIM-aligned sets before enforcing
dmarc email spf dkim metrics 705 tokens
DMARC aggregate reports name sending services by ASN owner, not brand — your own ESP can look like a spoofer
dmarc email deliverability asn postmark 777 tokens
SPF 10-lookup overflow is position-dependent, not a flat failure: a lyft.com case study
python dns spf dmarc email 991 tokens