# System

## Providers

On this page, you can view a list of connections to SMTP service providers and configure new connections.

It's important to select SMTP providers that offer unrestricted daily email sending, such as [Mailchimp](https://mailchimp.com/), [SendGrid](https://sendgrid.com/), or [Mailgun](https://www.mailgun.com/).

{% hint style="info" %}
**Unsuitable SMTP providers**

Providers that impose daily email sending limits aren't suitable for SMTP configuration. These services are typically designed for personal or small-scale usage and can't meet the demands of extensive mailing lists.

Examples of such providers include: Gmail, Yahoo Mail, Outlook (Hotmail), iCloud Mail, AOL Mail, Zoho Mail (free version), Yandex Mail, Proton Mail, GMX Mail, or Mail.ru.
{% endhint %}

### General information

The following information is provided about each SMTP connection:

**ID**

The identifier assigned to the connection.

***

**Caption**

The named assigned to the connection in the Back Office.

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**Driver**

The driver used for sending emails (smtp).

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**Host**

The SMTP host.

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**Port**

The SMTP port number.

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**Username**

The SMTP username that is used for authentication.

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**Send from**

The sender’s email address displayed to your email recipients.

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**Send from name**

The sender’s name displayed to your email recipients.

{% hint style="success" %}
**See also**

[How to configure SMTP](/how-to-articles/manage-mailing-options/how-to-configure-smtp.md)
{% endhint %}

***

**Encryption**

The encryption protocol used to securely communicate with the SMTP service provider. Possible options:

* TSL
* SSL

***

**Enabled**

The connection status.

If `true`, the connection is enabled; otherwise, `false`.

If the only connection to an SMTP service provider is configured, it can’t be disabled.

To view the connection details, click the **Edit** button.

### Details

On the details page, the masked **Password** field is displayed in addition to the general information.

To validate the connection settings, click the **Test connection** button. A green checkmark displayed on the button indicates that the connection has been configured properly.

## Queue

On this page, you can view the queue of unsent emails and delete them if necessary.

**ID**

The email identifier in the system.

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**Email**

The email address.

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**Subject**

The email subject.

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**Last attempt date**

The date of the last attempt to send the email.

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**Next attempt date**

The date of the next attempt to send the email.

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**Attempts count**

The number of attempts to send the email.

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**Status**

The status indicating the result of an email send attempt.

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**Reason**

The reason for an unsuccessful attempt.

## Log

On this page, you can view the mailing log.

**ID**

The email identifier in the system.

**Active queue ID**

The identifier of the queue in which the email is included.

**Email**

The client email address.

**Subject**

The email subject.

**Attempt date**

The date and time of the last attempt to send the email.

**Status**

The email delivery status (the available options: IN PROGRESS, FAIL, and SUCCESS).

**Reason**

The reason why the email delivery failed.


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