EmailFailureReason
Why the email failed. suppressed means the recipient is on the suppression list, invalid_recipient means the address cannot receive mail, bounced means a receiving server refused the message, expired means delivery kept being deferred until the retry window ran out, attachment_too_large and attachment_unavailable mean an attachment could not be included, dkim_key_mismatch means the sending domain's DKIM record is missing or does not match its signing key, sending_restricted means sending from the workspace was restricted until the message expired, platform_error means the failure was on the Epostix side, and not_delivered means the message was not delivered for a reason that could not be attributed. New values may be added.
Why the email failed. suppressed means the recipient is on the suppression list, invalid_recipient means the address cannot receive mail, bounced means a receiving server refused the message, expired means delivery kept being deferred until the retry window ran out, attachment_too_large and attachment_unavailable mean an attachment could not be included, dkim_key_mismatch means the sending domain's DKIM record is missing or does not match its signing key, sending_restricted means sending from the workspace was restricted until the message expired, platform_error means the failure was on the Epostix side, and not_delivered means the message was not delivered for a reason that could not be attributed. New values may be added.
Possible values: [suppressed, invalid_recipient, bounced, expired, attachment_too_large, attachment_unavailable, dkim_key_mismatch, sending_restricted, platform_error, not_delivered]
"suppressed"