<b>Best of the inbox: warm-up done right</b>

<b>Best of the inbox: warm-up done right</b>
New domain or new IP, the warm-up phase is where most affiliate lists get themselves filtered for good. The clearest guides, no tool-shilling.

🌡️ Warm-up
— SendGrid's IP warm-up schedule — the 30-day volume ramp table that became the industry default. Made the cut because it's conservative enough to actually survive Gmail.
— Mailgun's shared-vs-dedicated IP explainer — answers the question everyone asks too late: do you even need a dedicated IP at your volume?
— Postmark's 'reputation is the domain now' piece — argues IP warm-up matters less than engagement on Gmail. Included as the necessary counterpoint.

📈 Engagement
— A re-engagement-first sequencing guide — warm to your most active openers before touching the cold tail.

Saved you ~2 hours. The throughline: ramp slow, mail your best openers first, watch complaints daily.