What Is Email Warmup?

Email warmup is the process of gradually increasing the number of emails sent from a new account to build trust with email service providers and avoid spam filters.

It involves generating positive interactions such as opens, clicks, and replies to establish a strong sender reputation. This helps ensure your emails land in the inbox instead of the spam folder.

Warmup also protects your account from being flagged or blacklisted due to low engagement or spam complaints. It creates a healthy foundation for future campaigns by building trust and improving deliverability, which is especially important for new domains that take longer to establish reputation.

While the process can feel slow, skipping it puts your entire email strategy at risk. Poor warmup leads to poor deliverability - and once your domain is flagged, it’s hard to recover.

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