101

Account is temporarily disabled — contact Volt support if persists

102

Feature not enabled on account

103

Invalid “from” number

104

Account is temporarily blocked — contact Volt support if persists

199

Account is permanently disabled — contact Volt support if this is believed to be in error

401

Invalid message body

402

Invalid “to” number

403

Invalid combination of message arguments (generic)

406

Invalid message type

407

Invalid media type

501

Destination phone number is not routable

503

Destination phone number is on DNC list and has opted out

601

Exceeded messaging rate limit (Volt)

602

Exceeded API rate limit (Volt)

603

Exceeded AT&T sending limit (temporary)

701

Blocked as spam - permanent (Volt)

702

Blocked as spam downstream - temporary

703

Blocked as spam downstream - permanent

704

Rejected by destination carrier

705

Blocked as spam - temporary (Volt)

706

Undeliverable - possibly blocked as spam by destination carrier

801

Temporarily rejected by destination carrier for unspecified reason

802

Message expired — possibly handset out of range

803

Message expired — possibly overloaded destination carrier message center

804

Downstream provider is unavailable

901

Internal system error — contact Volt support if encountered