What are the most common misconfigurations seen in deliverability audits?
SPF issues:
- Multiple SPF records (causes permerror)
- Exceeding 10 lookups
- +all or overly permissive policies
- Missing mechanisms for actual sending services
DKIM issues:
- Missing DKIM entirely
- 1024-bit keys (should be 2048)
- Selector not matching signed messages
DMARC issues:
- p=none forever (never enforcing)
- Missing or invalid report addresses
- No DMARC at all
PTR issues:
- Missing reverse DNS on sending IPs
- Generic PTR names
- PTR not matching forward DNS
- Audit your DNS configuration quarterly.
Regular credential audits catch documentation errors before they cause problems.
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