FeedMailer can be set to run in 2 modes: Admin Feeds Mode or User List Mode. The mode is determined by the 'Show Admin Feeds Only' checkbox in Settings.
If checked, the module view will display a series of checkboxes for each of the feeds that the Administrator has set up in the 'Manage > Manage Admin Feeds' section.
If unchecked, the module view will allow each registered member to build their own list of feeds.

Include Title Only
When checked only the title of each individual feed item will be displayed in the email that is sent to subscribers.
Show Ventrian News Feeds
When checked a list of feeds will be shown in a dropdownlist in the Manage > Manage Admin Feeds tab. This list is made up of all exposed Ventrian News RSS feeds of the local portal, if the Ventrian News Articles module is installed. This setting should only be used if 'Show Admin Feeds Only' is checked.
Show Preview
When 'Show Admin Feeds Only' is unchecked each feed in the user's view can be previewed to show the latest item.
Preview Cache
This setting contains the number of minutes for which the feed preview should be cached.
Display
This setting determines the repeat direction of the user's list view.
Columns
This setting determines the number of columns of the user's list view.
Email Subject
This value will appear on the subject line of all emails sent be FeedMailer.
Description text editor
This setting allows you to add some content which appears at the top of the module view.
Email Header text editor
This setting allows you to add content which appears at the top of the email sent by FeedMailer. Tokens include [UserName] and [Email].
Email Footer text editor
This setting allows you to add content which appears at the bottom of the email sent by FeedMailer. Tokens include [UserName] and [Email].

SMTP Server
This value is used in case you want to use a different server to send emails, other than the current DotNetNuke installation.
SMTP Username
The Username to be used for authentication for the SMTP server.
SMTP Password
The Password to be used for authentication for the SMTP server.
SMTP email address
The email address to be used for sending emails from the SMTP server.
Preferred Portal Alias
This setting allows you to indentify which portalalias FeedMailer should use. This is only necessary if you have more than one portalalias.