--- 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). | General | | | ------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | Unsubscription page URL | Sets the URL of the page where users can unsubscribe from an [email feed](https://docs.kentico.com/k11/on-line-marketing-features/managing-your-on-line-marketing-features/email-marketing.md). The **Email feed unsubscription** web part must be placed on the specified page to ensure the required functionality.
The value of this setting is inherited by individual email feeds if their **Unsubscription page URL** property is not set. If empty, the **\~/CMSPages/Unsubscribe.aspx** default page is used. | | Double opt-in approval page URL | Sets the URL of the page where users can confirm their subscription to an email feed with double opt-in enabled. The **Subscription approval** web part must be placed on the specified page to ensure the required functionality.
The value of this setting is inherited by individual email feeds if their **Approval page URL** property is not set. If empty, the **\~/CMSModules/Newsletters/CMSPages/SubscriptionApproval.aspx** default page is used. | | 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 will expire and become invalid. | | Generate marketing emails if emails are disabled | If enabled, marketing emails will be generated and saved into the [Email queue](https://docs.kentico.com/k11/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 checked, 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 address of the mail server where the bounced emails are stored. POP3 is used to check the server and monitor bounced emails. | | Server port | Specifies the number of the port used to connect to the mail server. | | User name | Sets the user name used for authentication against the mail server. | | Password | Sets the password used for authentication against the mail server. | | Use SSL | Indicates whether the connection to the mail server should be secured using SSL. | | Authentication method | Allows the selection of the authentication method used for the connection to the mail server. Options include basic user name and password authentication and several challenge‑response mechanisms.
The _Auto_ option uses APOP if the server supports it and plain text user name and password authentication otherwise. |