# Mailbox Providers
Why is it important to monitor mailbox provider stats?
It’s important because the deliverability towards a specific provider can suddenly drop. This is a clear sign that a provider has started treating you negatively, so it’s critical to take action to improve the situation.
The following sections detail how to take advantage of **Mailbox Providers** feature within **Mailtrap API/SMTP**.
#### Mailbox Providers filters
Mailbox Providers Overview panel allows you to filter by **Domains**, **Mailbox Providers**, and **Categories**. Here’s how to use each filter.
**Domains**
1. Click on arrows in the All Domains box.
2. Choose one or more domains you’d like to use.
3. When you select the domain, the Table automatically shows corresponding statistics.
**Mailbox providers filter**
1. Click the arrows in the Mailbox Provider box.
2. Choose the provider you’d like to use.
3. Check the corresponding stats in the table below.
You can select a few providers at the same time - just repeat the actions listed above.
**Categories**
1. Click the arrows in the **Categories** box.
2. Choose a category or categories.
3. Preview the stats for that category in the table below.
#### Navigating mailbox providers
**Table**
The first column features **Mailbox Providers** of your recipients.
The stats include the number of **Delivered** emails. You can also see **Unique Opens** and **Unique Open Rate**, as well as **Clicked** emails and **Click Rate**.
Also, the Tables tab shows **Bounce** emails and **Bounce Rate**, plus **Spam** and Spam **Complaints**. Finally, you can see the **Clicked to Open Rate**.
You can learn more about [Stats](https://docs.mailtrap.io/email-api-smtp/analytics) here.
**Color coding**
To immediately understand email deliverability, the table features colors that signal if the value is good, bad, or just average.
* Green - good results - exceed what we perceive as a satisfactory value for a particular data point.
* Yellow - borderline results - neither good nor bad, and may require your attention or action.
* Red - the result is under the threshold we consider satisfactory and it requires your action to improve the performance of a specific mailbox provider.
