Will warmup and validation become built-in ESP features?
Trend toward integration: some ESPs include basic validation, automated warmup assistance, and deliverability guidance. Platform completeness is competitive differentiator.
Specialist tools remain relevant: deeper validation capability, cross-**ESP** warmup management, and features beyond what ESPs prioritize. Best-of-breed tools serve senders needing advanced capability.
Likely future: basic warmup and validation become standard **ESP** features; advanced needs continue using specialized tools. Integration improves convenience for common cases while specialists serve advanced requirements.
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