What’s the difference between free and enterprise tools?
Free tools (MxToolbox free tier, **mail-tester**.com, Google Postmaster) provide basic checking: point-in-time authentication tests, single-message spam analysis, and limited reputation visibility. Good for spot checks but not continuous monitoring.
Enterprise tools (**Validity**, **GlockApps** paid tiers) provide: continuous monitoring with alerting, historical trending, comprehensive seed panel coverage, detailed analytics, **API** access, and support. They enable systematic deliverability management.
Choose based on: sending volume (higher volume justifies monitoring investment), deliverability sensitivity (revenue-critical email needs visibility), internal expertise (less expertise needs more tool guidance), and budget. Most serious senders benefit from some paid monitoring.
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