<b>HEARD: The dirty secret of every email automation platform — they don't actually fix your deliverability.</

<b>HEARD: The dirty secret of every email automation platform — they don't actually fix your deliverability.</b>

Sendgrid, Mailgun, Postmark and the rest hand you the infrastructure, but inbox placement is a reputation game tied to your sending domain and IP, not their logo. A shared IP pool means you inherit your neighbors' spam complaints.

What insiders know: Postmark famously bans bulk marketing mail entirely to protect transactional deliverability — that's a feature, not a limitation.

— Dedicated IPs need 4-6 weeks of gradual warmup
— Separate transactional and promo streams on different domains

Watch this.