# Channels

- [Global SMS](/help-center/integrations/channels/global-sms.md)
- [Getting Started](/help-center/integrations/channels/global-sms/getting-started.md)
- [SMS Basic Principles](/help-center/integrations/channels/global-sms/sms-basic-principles.md)
- [SMS Features](/help-center/integrations/channels/global-sms/sms-features.md)
- [API Interface](/help-center/integrations/channels/global-sms/sms-features/api-interface.md)
- [SMPP](/help-center/integrations/channels/global-sms/sms-features/smpp.md)
- [Mass Messaging](/help-center/integrations/channels/global-sms/sms-features/mass-messaging.md)
- [Sender ID](/help-center/integrations/channels/global-sms/sms-features/sender-id.md)
- [Verify](/help-center/integrations/channels/verify.md)
- [Getting Started](/help-center/integrations/channels/verify/getting-started.md)
- [Verification Features](/help-center/integrations/channels/verify/verification-features.md)
- [Verification Message Templates](/help-center/integrations/channels/verify/verification-features/verification-message-templates.md)
- [Security Settings](/help-center/integrations/channels/verify/verification-features/security-settings.md)
- [Verification Analysis](/help-center/integrations/channels/verify/verification-features/verification-analysis.md)
- [Custom OTP](/help-center/integrations/channels/verify/verification-features/custom-otp.md)
- [Best Practices for Verification](/help-center/integrations/channels/verify/best-practices-for-verification.md)
- [Best Practices](/help-center/integrations/channels/verify/best-practices-for-verification/best-practices.md)
- [Verification Channel Selection](/help-center/integrations/channels/verify/best-practices-for-verification/verification-channel-selection.md)
- [Verification via WhatsApp](/help-center/integrations/channels/verify/best-practices-for-verification/verification-via-whatsapp.md)
- [Preventing Fraud and Invalid Registrations](/help-center/integrations/channels/verify/best-practices-for-verification/preventing-fraud-and-invalid-registrations.md)
- [Email](/help-center/integrations/channels/email.md)
- [Getting Started](/help-center/integrations/channels/email/getting-started.md)
- [Basic Principles](/help-center/integrations/channels/email/basic-principles.md)
- [Email Features](/help-center/integrations/channels/email/email-features.md)
- [Domain Configuration](/help-center/integrations/channels/email/email-features/domain-configuration.md)
- [Sending Emails via API](/help-center/integrations/channels/email/email-features/sending-emails-via-api.md)
- [Monitoring and Optimization](/help-center/integrations/channels/email/email-features/monitoring-and-optimization.md)
- [Best Practices for Email](/help-center/integrations/channels/email/best-practices-for-email.md)
- [Separate Marketing Subdomain](/help-center/integrations/channels/email/best-practices-for-email/separate-marketing-subdomain.md)
- [Warm-up Sending](/help-center/integrations/channels/email/best-practices-for-email/warm-up-sending.md)