Troubleshooting Delivery Issues
What are all of the possible statuses and what do they mean?
Email Statuses:
|
Status |
Description |
|---|---|
|
In Progress |
Email is being sent |
|
Sent (Delivered) |
Email has been delivered |
|
Failed (Bounce) |
Email has bounced from the recipient mail server because the email address does not exist |
|
Failed (Dropped) |
Email has been dropped by the recipient mail server because of repeated bounces |
|
Not Sent (Unsubscribed) |
Email was not sent because the recipient unsubscribed |
Text Statuses:
|
Status |
Description |
|---|---|
|
In Progress |
Text message is being sent |
|
Sent |
Text message has been sent to the carrier |
|
Sent (Delivered) |
Carrier has confirmed text message delivery |
|
Failed (Undelivered) |
Text message could not be sent due to an internal error |
|
Failed (General failure) |
Text message could not be sent due to an unknown error |
|
Not Sent (Unsubscribed) |
Text message was not sent because the recipient unsubscribed |
|
Not Sent (Invalid number) |
Text message was not sent because the supplied phone number is not valid |
|
Failed (Phone cannot receive texts) |
The message send failed because the recipient is unable to receive text messages |
|
Failed (Phone is off or disconnected) |
The message send failed because the recipient phone is not connected |
|
Failed (Message blocked) |
The message send failed because it was blocked |
|
Failed (Number unknown or not in service) |
The message send failed because the number is not in service |
|
Failed (Filtered out by carrier) |
The message send failed because it was filtered by the carrier |
|
Failed (Unknown error from carrier) |
The message send failed due to an error from the carrier |
|
Failed (Unknown error) |
The message send failed due to an unknown error |
Voice Statuses:
|
Status |
Description |
|---|---|
|
In Progress (Pending) |
Voice call is waiting to be sent |
|
In Progress (Retry due to error) |
Voice call failed from an internal error and will be retried |
|
In Progress (Initiated) |
Voice call is starting |
|
In Progress (Sending) |
Voice call is in progress |
|
In Progress (Ringing) |
Voice call is ringing |
|
Sent (Delivered) |
Voice call completed |
|
Not Sent (Duplicate number) |
Voice call not sent because one was already sent to this number |
|
Not Sent (Unsubscribed) |
Voice call not sent because recipient unsubscribed |
|
Not Sent (Invalid number) |
Voice call not sent because the phone number is invalid |
|
Failed (General failure) |
Voice call failed due to an unknown error |
|
Failed (Did not answer) |
Voice call failed because the recipient did not answer |
|
Failed (Busy) |
Voice call failed because the recipient line was busy |
|
Failed (Blocked country) |
Voice call failed because the recipient country is blocked |
Why are some text messages filtered by carrier?
Cellphone carriers use an automated system to detect and filter out potential spam messages. They do not publish the exact conditions for filtering out messages to ensure that malicious actors do not use the information to game the system.
Here are some common conditions for text message filtering:
-
Overly long messages
-
Overly capitalized messages
-
Mysterious links
-
URL shorteners
-
Hyperbole
-
Aggressive language
-
Blacklisted words or phrases
-
Lack of Opt-out instructions