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Accidently lost my 600 guest addresses How to restore

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I was trying to send out email to my guest list and must have pressed the wrong delete button Entire list of 600 guest addresses vanished. Help needed to restore them

I was trying to send out email to my guest list and must have pressed the wrong delete button Entire list of 600 guest addresses vanished. Help needed to restore them

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Generally when you delete contacts from an address book they are gone. That is why you should make backups. This add on may be able to recover them.https://freeshell.de/~kaosmos/morecols-en.html