There might be a few different reasons to why your notification was not delivered. Check the notification status of the contact on the not delivered list and read what it means below.
Email was not sent
Case | Possible reason | How to fix |
Email Service: Spam Report | The user marked your post as spam. | Ignore, focus rather on contacts that want your communication |
Email Service: Dropped | The email service decided to not deliver the email. Might be caused by earlier blocks. | Ignore, focus rather on contacts that want your communication |
Email Service: Blocked | The recipient's mail server actively refused the message, usually for reputation reasons (sending IP/domain flagged) or content filtering. | Usually transient and tied to the recipient's server policy - wait and retry later, or contact support if it persists across many contacts. |
Email Service: Bounce | The email service was not able to deliver to that email. The email might be wrong. | Consider updating the email address to a correct one |
Quarantine: Same message twice in 24hrs | The user already received an identical post | Check whether already received an identical post. If not, contact support. |
Blacklisted: Spam Report | The email address has previously reported posts from you as spam. | Ignore, focus rather on contacts that want your communication |
Blacklisted: Dropped | The email service has previously decided to not deliver the email. | Ignore, focus rather on contacts that want your communication |
Blacklisted: Blocked | This address was previously blocked by its mail server, so we stopped sending. | Often a recipient-side reputation block. If the address is still valid, contact support to review. |
Blacklisted: Bounce | The email service was previously not able to deliver to that email. The email might be wrong. | Consider updating the email address to a correct one |
SMS was not sent
Case | Possible reason | How to fix |
SMS Service: Unknown Subscriber | The phone number does not belong to an identified person eligible for SMS marketing | Consider moving the contact to email communication. |
SMS Service: Unknown Subscriber | The phone number belongs to a person under age 13 that's not eligible for SMS marketing | Consider moving the contact to email communication. |
SMS Service: Rejected | The sms decided to not deliver the SMS. Might be a not valid phone number. | Consider correcting the phone number or move the contact to email. |
SMS Service: Failed / Undelivered | The carrier accepted the message but couldn't deliver it (handset unreachable, out of coverage, number ported, etc.). | Often transient. If it keeps failing for the same contact, the number may be inactive - update it or move to email. |
Quarantine: Same message twice in 24hrs | The user already received an identical post | Check whether already received an identical post. If not, contact support. |
Blacklisted: Unknown Subscriber | The phone number does not belong to an identified person eligible for SMS marketing | Consider moving the contact to email communication. |
Blacklisted: Unknown Subscriber | The phone number belongs to a person under age 13 that's not eligible for SMS marketing | Consider moving the contact to email communication. |
Blacklisted: Rejected | The sms decided to not deliver the SMS. Might be a not valid phone number. | Consider correcting the phone number or move the contact to email. |