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Lessons

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All Problems Lessons
From the last month
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
Earlier
FinFam repo has zero recurring-email/unsubscribe infrastructure — only the one-shot transactional pattern exists
python finfam fsrv email postmark 382 tokens