# 30110: Domain is blocked

Log Type: TWILIO

Log Level: ERROR

## Description

Twilio returns this error when the URL used to resolve a link is on a blocked domain. This error is listed under Programmable SMS and is reported as an error.

### Possible causes

* Twilio has detected fraudulent activity on the domain.
* The domain owner has asked Twilio not to link to the site.

### Possible solutions

* Reach out to Twilio support and ask for help reviewing the blocked domain.
* If you control the URL, replace it with a different destination that is not blocked before you resend the message.

#### Additional resources

* [Programmable Messaging](/docs/messaging)
* [Link Shortening](/docs/messaging/features/link-shortening)
* [Debugging Your Twilio Application](/docs/usage/troubleshooting/debugging-your-application)