Kentico CMS 7.0 Context Help



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E-mail encoding

Sets the character encoding used for the e-mails sent by the system. By default, UTF-8 is used. It is recommended to leave the default encoding unless you encounter issues with extended characters in your e-mails.

E-mail format

Format used for e-mail messages. You can choose between HTML and Plain text. If Both is selected and an e-mail template has both formats defined, HTML will be used for the e-mail text and plain text will be included as an attachment.

E-mail processing

Enable e-mails

If checked, e-mail sending will be enabled. You can temporarily disable sending of e-mails by unchecking this box, e.g. when performing administration tasks.

Enable e-mail queue

If checked, an e-mail queue will be used when sending e-mails. This allows advanced e‑mail processing and automatic resending of mails that are lost due to errors. If disabled, e-mails will be sent directly to the SMTP server.


Using the e‑mail queue is highly recommended when sending out large amounts of e‑mails over a short amount of time (newsletters or other types of mass e‑mails).

Batch size

Sets the maximum number of e-mails that can be transferred from the e-mail queue to an SMTP server in one batch. If the specified value is smaller than the total amount of e-mails to be sent from the queue, a new batch is prepared and assigned to the next available server. This process is repeated until all e-mails are mailed out.


This setting affects all sites in the system, so it is only available if the (global) option is selected from the Site drop‑down list.

Archive e-mails (days)

Sent e-mails will be stored by the e-mail queue for the number of days specified here. Such e‑mails may be viewed on the CMS Site Manager -> Administration -> E-mail queue -> Sent e-mails tab.


If set to 0, e-mails will not be archived.

SMTP server

SMTP server

The SMTP server specified here will be used as the default option when sending e‑mails. Depending on the value selected in the Site drop‑down list, the server will either be dedicated to a single website, or will be designated as a global server (i.e. it will accept e‑mails from all sites in the system and also handle mails that are not related to any specific website).


This field must contain the domain name or IP address of the server. If the connection to the server should use a different port than 25, please include it in the name. Enter localhost if you wish to use the server provided by your local machine.


Additional servers that will be used if this one is busy may be defined in Site Manager -> Administration -> SMTP servers.

SMTP server user

If the server requires authentication, you can enter the user name here.

SMTP server password

If the server requires authentication, you can enter the password here.


Indicates if the SMTP connection to the server should be secured by SSL. The server must be configured to use SSL in order for this to work.

More resources can be found in:


Developer's Guide -> Modules -> E-mail queue -> Overview

Developer's Guide -> Installation and deployment -> Additional configuration tasks -> SMTP server configuration