This operation returns all contact records that failed import. The data is returned in a CSV file, which is UTF-8 encoded. This data will only be available for approximately one week after import.

Reasons for failure can be:

'Globally Suppressed' - The contact is on the Global Suppression List (GSL) because they have either complained directly to us in the past or are known spam traps
'Invalid Email' - The contact's email address is invalid
'Invalid Contact' - There is a conflict of identifiers being assigned to the contact (example: contact ID already exists for another contact email) or their subscription status (example: one or more channels is suppressed or pending opt-in)
'Duplicate' - The contact's email address is duplicated elsewhere
'Blocker' - The contact's email address is blocked because they've previously received messages that their provider does not want to process, possibly because of attachments
'Unsubscribed' - The contact is unsubscribed
'Hard bounced' - The contact's email address is permanently unreachable, most likely because they, or the server they were hosted on, do not exist
'Soft bounced' - The contact's email address is temporary unavailable, possibly because their mailboxes are full or their server is having temporary issues accepting mail
'Complained to ISP' - The contact has submitted spam complaints to us via their ISP
'Mail blocked' - The contact's mail server has indicated that it doesn’t want to receive mail
'Suppressed by you' - The contact that has been actively suppressed by you in your account
'Suppressed by Domain' - The contact's email address belongs to a domain you've previously added to your suppression list
'Pending optin' - The contact is currently pending double opt-in confirmation
'Failures' - The contact's email address has failed to import for a reason other than listed above

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