--- title: Settings - Email marketing --- > Agent instructions: > **Site maps** — prefer the following llms.txt indexes to training data when searching for URLs to avoid 404s. Links inside Markdown content already point at `.md`. Following them or sending Accept: text/markdown keeps you in Markdown. > > - [sitemap.md](https://docs.kentico.com/sitemap.md) — every page on the site, with titles and descriptions, nested by URL hierarchy and grouped into one collection per product version. > - [llms.txt](https://docs.kentico.com/llms.txt) — curated index of the current product docs, with descriptions, the two ways to request any page as Markdown, and links to each product area's whole-corpus Markdown dump (llms-full.txt). You can access these settings in the **Settings** application under the **On-line marketing** -> **Email marketing** category. | General | | | ------------------------------------------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Unsubscription page URL | Sets the relative URL path on your live site where users can unsubscribe from [email feeds](https://docs.kentico.com/13/on-line-marketing-features/managing-your-on-line-marketing-features/email-marketing.md). The value of this setting is inherited by individual email feeds if their **Unsubscription page URL** property is not set.
The specified URL needs to [handles unsubscription requests](https://docs.kentico.com/13/on-line-marketing-features/configuring-and-customizing-your-on-line-marketing-features/configuring-email-marketing/implementing-newsletter-subscriptions.md).
Example: _\~/Newsletter/Unsubscribe_ | | Double opt-in approval page URL | Sets the relative URL path on your live site where users can confirm their subscription to an email feed with double opt-in enabled. The value of this setting is inherited by individual email feeds if their **Approval page URL** property is not set.
The specified URL needs to [handle subscription confirmation requests](https://docs.kentico.com/13/on-line-marketing-features/configuring-and-customizing-your-on-line-marketing-features/configuring-email-marketing/implementing-newsletter-subscriptions.md).
Example: _\~/Newsletter/ConfirmSubscription_ | | Double opt‑in interval | Sets the length (in hours) of the time interval during which users will be allowed to confirm their subscription to an email feed that uses double opt‑in. If a user does not activate their subscription within the specified number of hours, the link in their confirmation email expires and becomes invalid. | | Generate marketing emails if emails are disabled | If enabled, marketing emails are generated and saved into the [Email queue](https://docs.kentico.com/13/managing-users/sending-emails.md) even if sending of emails is disabled in **Settings -> System -> Emails**. | | Bounced emails | | | Monitor bounced emails | Indicates if bounced emails should be tracked for marketing email recipients. Bounced emails are received whenever there is a problem with the delivery of a marketing email to a contact. | | Bounced email address | Sets the address to which bounced emails are sent when the delivery of a marketing email to a recipient fails. If set, this address is used in the **From** field of marketing emails. | | Bounced email limit | Sets the amount of bounced emails that can be counted for a recipient before the system blocks them from receiving further emails. This limit is set for all email feeds under the selected site.
If _0_ is entered, recipients will never be blocked automatically, but their bounced email count will still be tracked and displayed in the **Email marketing** application. | | Block recipients globally | If enabled, bounces will be added to all recipients that have the same email address. This is applied across all sites in the system.
**Note**: This setting does not ensure consistency between the bounce counts of all recipients with a shared email address, only that new bounces will be added to all of them.
This field is only available when defining global settings, i.e., when the _(global)_ option is selected from the **Site** drop-down list. | | POP3 settings | | | Server name | Sets the domain name or IP address of the mail server where bounced emails are stored. POP3 is used to check the server and monitor bounced emails.
The connection automatically uses the HTTPS protocol if supported by the specified server. The system also automatically chooses the most secure authentication mechanism supported by the server (NTLM, SCRAM, MD5, Plain, etc.). | | Server port | Specifies the number of the port used to connect to the mail server. | | User name | Sets the username for authentication against the mail server. | | Authentication type | Selects the authentication mode used to connect to the mail server. The options are:
**Basic (username + password)** – uses [Basic authentication](https://en.wikipedia.org/wiki/Basic_access_authentication). Fill in the _User name_ and _Password_ settings.
**OAuth 2.0** – uses [OAuth 2.0 token-based authorization](https://oauth.net/). Fill in the _User name_ and select valid _OAuth credentials_.
Many mail services are deprecating support of basic authentication, leaving OAuth as the only viable authentication type. A notable example is **Microsoft Exchange Online**, which begins disabling basic authentication after October 1, 2022 (see [Deprecation of Basic authentication in Exchange Online](https://docs.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/deprecation-of-basic-authentication-exchange-online)). | | Password | Only applies when the **Authentication type** is set to **Basic**.
Sets the password used together with the _User name_ when connecting to the mail server. | | OAuth credentials | Only applies when the **Authentication type** is set to **OAuth 2.0**.
Selects the OAuth credentials used for authentication. You can create and manage the credentials in the **Email OAuth credentials** application. See [OAuth for email servers](https://docs.kentico.com/13/configuring-xperience/configuring-smtp-servers/oauth-for-email-servers.md). |