6sense Email Provider: Shared IPs?

Laurel Slutsky
Laurel Slutsky Posts: 25 6senser
in AI Email

As of today, October 2025, we use shared IPs for 6sense Email Provider. I've had a few customers ask if this will negatively impact their reputation if another customer abuses this.

Here's the TLDR!

  • White-labeled + authenticated: All mail is fully white-labeled with SPF, DKIM, DMARC — so it’s sent under their domain, protecting brand reputation at the domain level.
  • Deliverability safeguards: SendGrid is a market leader & manages sophisticated IP warming, monitoring, and reputation protection.
  • Dedicated IP myth: Dedicated IPs only make sense at ~10k+ emails/day per IP. Below that volume, they actually hurt deliverability because there isn’t enough consistent sending to build/maintain reputation.

So for most customers, shared IPs are actually safer and more effective for inbox placement.

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