The fastest way to send multiple cards to many different recipients through the Red Stamp app is to have all of your contacts already in your address book on your iPhone. Having your contacts in your phone is great to have on hand for other tasks outside of the Red Stamp app as well.
iTunes has the ability to sync your contacts from Microsoft Outlook, and Windows Contacts to your iPhone.
Note: iTunes can sync vCards (.vcf) or Windows Contact (.contact) files, but only from one program at a time. If you sync from Outlook and then Windows Contact, your previous contacts will be overwritten. Outlook 2003 or later is required to sync contacts and calendars from Outlook. Windows 7 does not include Windows Contacts.
To configure iTunes to sync contacts to your iPhone/iPod/iPad:
- Open iTunes.
- Connect your device and wait for it to appear in the iTunes Source pane.
- In the Source pane under Devices select your iPod. This displays the device's Preferences.
- Click Info.
- Select the "Sync Contacts from..." checkbox.
- From the menu, choose the program (Outlook or Windows Contacts) that contains the contacts you want to sync with your device.
- Click Apply.
Tip: iTunes for Windows can only sync Microsoft Outlook and Windows Contacts automatically. Note: Contact Groups from Windows Contacts will not sync with iPod.
Note: iTunes for Windows can only sync contacts from one source at a time, either Outlook or Contacts. If you change the sync source, your new contacts will overwrite the previously stored contacts.
Source :: www.support.apple.com