# Email Sources Attributes

Tomba tracks where email addresses are found across the web, associating each one with metadata about its origin and timing.

These fields describe where and when an email address was observed on the internet.

| Attribute       | Description                                   | Example                                                                                                                                                                    |
| --------------- | --------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `uri`           | Source file or document URL                   | [https://github.com/tomba-io/generic-emails/blob/...](https://github.com/tomba-io/generic-emails/blob/084fc1a63d3cdaf9a34f255bedc2baea49a8e8b9/src/lib/validation/hash.ts) |
| `website_url`   | Base website where email was found            | github.com                                                                                                                                                                 |
| `extracted_on`  | Timestamp when email was extracted            | 2021-02-08T20:09:54+01:00                                                                                                                                                  |
| `last_seen_on`  | Timestamp of the last time the email was seen | 2021-02-08T22:43:40+01:00                                                                                                                                                  |
| `still_on_page` | Whether the email still exists on the page    | true                                                                                                                                                                       |

## Source Limit

Tomba limits the number of sources returned per email address to a maximum of **20**.
This ensures performance while still providing reliable discovery data.

## Timestamps Explained

- `extracted_on`: The **first time** this email address was detected on the source.
- `last_seen_on`: The **most recent time** it was found on the same page.

These fields help track how long an email has been publicly available.