export to excel and use fill to enter a dummy address in the email field
then import. another option would be to use vba to add it, but unless you
know vba, it's faster to export... if there are notes in the notes field on
the contacts, VBA might be better though, especially if the notes are long.

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>I was wondering if someone knew how to add a placeholder email address to
> all contacts? SharePoint wont allow you to import contacts that do not
[quoted text clipped - 7 lines]
> their email field? I have searched high and low and cant seem to find
> anything. Thanks in advance for you help!