> For the complete documentation index, see [llms.txt](https://docs.bird.com/applications/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bird.com/applications/help-and-reference.md).

# Help & Reference

- [Deliverability & compliance](https://docs.bird.com/applications/help-and-reference/deliverability-and-compliance.md)
- [Email compliance - Bulk sending](https://docs.bird.com/applications/help-and-reference/deliverability-and-compliance/email-compliance-bulk-sending.md)
- [United States SMS/MMS compliance](https://docs.bird.com/applications/help-and-reference/deliverability-and-compliance/united-states-sms-mms-compliance.md)
- [Key US Regulations](https://docs.bird.com/applications/help-and-reference/deliverability-and-compliance/united-states-sms-mms-compliance/key-us-regulations.md)
- [General US content restrictions](https://docs.bird.com/applications/help-and-reference/deliverability-and-compliance/united-states-sms-mms-compliance/general-us-content-restrictions.md)
- [US SMS/MMS compliance](https://docs.bird.com/applications/help-and-reference/deliverability-and-compliance/united-states-sms-mms-compliance/us-sms-mms-compliance.md)
- [US Voice compliance](https://docs.bird.com/applications/help-and-reference/deliverability-and-compliance/united-states-sms-mms-compliance/us-voice-compliance.md)
- [US state-level laws and regulations](https://docs.bird.com/applications/help-and-reference/deliverability-and-compliance/united-states-sms-mms-compliance/us-state-level-laws-and-regulations.md)
- [US compliance & best practices checklist](https://docs.bird.com/applications/help-and-reference/deliverability-and-compliance/united-states-sms-mms-compliance/us-compliance-and-best-practices-checklist.md)
- [US compliance FAQs](https://docs.bird.com/applications/help-and-reference/deliverability-and-compliance/united-states-sms-mms-compliance/us-compliance-faqs.md)
- [Singapore SMS Compliance](https://docs.bird.com/applications/help-and-reference/deliverability-and-compliance/singapore-sms-compliance.md)
- [Data protection](https://docs.bird.com/applications/help-and-reference/data-protection.md)
- [Approved subprocessors](https://docs.bird.com/applications/help-and-reference/data-protection/approved-subprocessors.md)
- [V2 Approved subprocessors](https://docs.bird.com/applications/help-and-reference/data-protection/v2-approved-subprocessors.md)
- [Bird Updates](https://docs.bird.com/applications/help-and-reference/bird-updates.md): Keep track of the latest product and feature releases from Bird here:
- [Glossary](https://docs.bird.com/applications/help-and-reference/glossary.md): Definitions for terms used across Bird.


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