# 21759: Advanced Opt-Out Length Invalid

Log Type: APPLICATION

Log Level: ERROR

## Description

The campaign submission could not be processed because the opt-out and help messages and keywords for the provided messaging service's advanced opt-out configuration are not of a valid length. Please verify that the opt-out and help messages are between 20 and 320 characters each. Also verify each set of comma delimited opt-out and help keywords does not exceed 255 characters.

### Possible causes

Messages not between 20-320 chars, or keywords exceed 255 chars.

### Possible solutions

Adjust message/keyword lengths to stay within limits.