If your emails contain sales-oriented language or certain content patterns, spam filters may flag them before they ever reach your audience. Warming up your actual templates — not just your sender domain — signals to email providers like Gmail that your messages are legitimate. This helps them land in the Primary inbox instead of spam, improving reply rates and protecting your sender reputation.

Anyone on the Smart Plan who wants to warm up specific email campaigns before sending. This feature is not available on the Essential Plan.

In the left navigation menu, click My templates.

Click + Add a template in the top-right corner. The button shows your current usage (e.g. "3/5" means 3 of your 5 template slots are used).

Compose the email you plan to send to your real audience. Use the actual subject line and body copy from your campaign — the closer this is to what you'll send, the more useful the warm-up data will be.

Save the template, then toggle it on in the Spam R... column to activate warm-up for that template.

For best results, leave the template active for at least 3 to 7 days before sending it to your real audience. lemwarm needs this time to build a reliable signal with email providers.

lemwarm tracks the spam rate for each template in the My templates list view. If a template's spam rate gets too high, lemwarm will automatically disable it to protect your sender reputation. Review this regularly before launching your campaign.

Smart Cluster personalizes your warm-up network based on who you want to reach, making warm-up signals more relevant to your actual audience.

Smart Content generates sales-oriented or professional warm-up emails aligned with your outreach goals, instead of generic messages.