# Identifying Email Service Providers (Google, Outlook, Others)

Email service provider identification is a core part of the CSVgo workflow.

Instead of treating all inboxes the same, CSVgo automatically detects which provider handles incoming email for each address and groups them accordingly.

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### The Three Provider Groups

CSVgo classifies inboxes into three clear categories:

#### Google

Inboxes hosted on Google infrastructure, such as Gmail and Google Workspace.

These inboxes are commonly used by:

* Startups
* SMBs
* SaaS companies
* Modern B2B teams

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#### Outlook

Inboxes hosted on Microsoft infrastructure, including Outlook and Microsoft 365.

These inboxes are common in:

* Larger organizations
* Enterprises
* Traditional B2B companies

They typically apply stricter filtering rules.

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#### Others

All remaining providers, including:

* Custom mail servers
* Regional providers
* Legacy hosting setups
* Industry-specific email infrastructure

This category captures inboxes that do not fall under Google or Microsoft.

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### How CSVgo Identifies Providers

CSVgo analyzes domain-level and mail routing signals to determine which provider is responsible for receiving email.

This happens automatically during processing.\
No manual lookups or external tools are required.

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### Why Provider Identification Matters

Different providers:

* Apply different spam filters
* React differently to volume
* Require different warm-up behavior
* Produce different reply patterns

Sending blindly across providers often reduces performance.

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### Practical Benefits of ESP Identification

With provider data, you can:

* Segment campaigns by provider
* Delay Outlook sending during warm-up
* Adjust volume and pacing
* Test copy on one provider before scaling
* Isolate deliverability issues faster

This turns deliverability into a controllable variable.

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### Removing the Need for External Tools

Without CSVgo, ESP identification usually requires:

* Additional paid services
* Manual domain checks
* Spreadsheet filtering
* Repeated exports and imports

CSVgo includes ESP identification by default.

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### Where This Data Appears

Provider information is available:

* In analytics
* In all relevant exports
* As a filterable field in downstream tools

This ensures provider data remains usable throughout your workflow.

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### Key Takeaway

Identifying email service providers allows you to:

* Send smarter, not harder
* Protect sender reputation
* Improve inbox placement
* Increase reply rates

CSVgo makes ESP segmentation automatic, accurate, and fast.