How to segment by engagement freshness to protect reputation?

Different mailbox providers have different filtering systems, reputation thresholds, and behaviors. Segmenting by provider lets you address each one's requirements.

Extract domain from email address. The part after the @ tells you the provider. gmail.com, yahoo.com, outlook.com are the major consumer providers. Corporate domains reveal business email.

Group similar providers. You don't need a segment for every domain. Group Gmail and Google Workspace. Group Outlook.com, Hotmail, and Microsoft 365. Group Yahoo and AOL (both Verizon Media).

Why this matters:

Gmail weighs engagement heavily. If your Gmail users aren't engaging, you'll land in spam there while reaching other providers fine.

Microsoft has different reputation systems and may have stricter content filtering for certain keywords or patterns.

B2B corporate domains often use security gateways that filter differently than consumer mailbox providers.

Use cases: If your Gmail deliverability drops, you might temporarily reduce sends to Gmail while you fix the issue. Or you might send re-engagement campaigns only to Gmail users who've gone quiet.

Track metrics by provider segment. Open rates, click rates, and complaint rates by provider reveal where you're succeeding and struggling.