The first few switches on this page control where MailShot saves “group contacts” (when “Create Group Contacts” is enabled on the previous page)
As a rule, I would recommend that you save these contacts to iCloud Contacts, as there are known problems with Exchange services containing groups larger than 20 contacts.
Use Default
This option makes MailShot save the contacts it creates to your current “Default” address book. It should usually be left disabled, as the following options provide better control.
TIP The Default address book is defined in the Contacts section of the “Mail, Contacts Calendars” page in the “Settings” app. It will be on the “Contacts” page in iOS 10.
If “Use Default” is disabled, MailShot uses the first available address book to be enabled on this list to save its contact, following the next update of a group.
- CardDAV (iCloud) typically iCloud.
- Exchange used for Outlook and Gmail contacts, and company accounts.
- CardDAV (Yahoo) typically Yahoo.
- CardDAV (Google) Accessing Google with a CardDAV method.
- LDAP no-one knows (kidding)
- Local Address Book an address book local to your device when you don’t have iCloud.
- CardDAV (null) This is the type Facebook use, and it is disabled by default as you cant store MailShot contacts to Facebook.
Disable address book types you DONT want to use. For example- if you have both iCloud and Exchange address books, and want MailShot to store contacts to Exchange, disable iCloud.
NOTE: You probably don’t want to change the options past this point…
Long Address Format
Save in a format usable from Contacts in iOS9.
Short Address Format
Save in a format needed by some Outlook servers.
Dummy Address
Used for testing
Include Contact Names
Will include the contacts’ names, as well as their email addresses in the strings that are saved
Update Old Groups
Converts groups written in Short address format to the currently-selected format.
Soluble Apps 