What is a Sender ID?
Sender ID is the name or number that appears as the message sender on the recipient’s device.Sender ID Types
| Type | Example | Support |
|---|---|---|
| Alphanumeric | ”MyBrand” | Country-dependent |
| Numeric | ”+14151234567” | Most countries |
| Short Code | ”12345” | US, Canada, UK |
What are the Sender ID country categories?
| Category | Description |
|---|---|
| Dynamic | Instant sender ID support |
| Pre-registration | Requires carrier approval before use |
| Not Supported | Must use numeric sender ID |
Which countries require Sender ID pre-registration?
| Country | Registration Fee | Recurring Fee | ETA |
|---|---|---|---|
| Singapore | Yes | Monthly | Varies |
| India | DLT registration | — | 2-4 weeks |
| UK | Yes | — | 1-2 weeks |
How do I register a Sender ID?
- Navigate to Messaging > Settings > Sender ID
- Select country
- Submit registration with required documents
- Wait for carrier approval
What are the requirements for sending SMS to India?
| Business Location | Currency | Route | Requirements |
|---|---|---|---|
| India | INR | Domestic | GST registration, DLT registration |
| Outside India | USD | International | — |
DLT Registration
- Required for all domestic SMS
- Register templates and headers
- See DLT documentation
PE-TM Binding Chain
- TRAI requirement for domestic traffic
- Principal Entity must bind with Telemarketer
- Complete binding before sending
How to comply with TRAI’s PE-TM Binding Chain requirement?
The Principal Entity (PE) must bind with Telemarketer (TM) before sending domestic SMS in India. This is a TRAI regulatory requirement. Complete the binding process through the DLT portal before initiating messaging.What are the Singapore Sender ID requirements?
Full SMS Sender ID Registry (SSIR):- All sender IDs must be registered with SGNIC
- Unregistered sender IDs are blocked
- Registration required for all organizations
What are the UK SMS regulations?
A2P SMS Filtering:- Carriers actively filter unregistered traffic
- Register sender IDs to avoid filtering
- Follow UK carrier guidelines
Can I send messages from Canadian long codes to US?
Cross-Border Restrictions:- Canadian long codes cannot send to US
- Use US numbers for US destinations
- Toll-free and short codes work cross-border
How does opt-out (DND) work?
For complete information on opt-out keywords, opt-in keywords, and suppression list management, see DND Service. Key points:- STOP, END, QUIT, CANCEL, UNSUBSCRIBE are recognized opt-out keywords
- Messages to opted-out users are blocked and not charged
- Users can opt back in with UNSTOP or START keywords
- Always include opt-out instructions: “Reply STOP to opt out”
Can I receive email alerts for message delivery issues?
Yes. Plivo monitors delivery rates and alerts you to issues.Alert Types
| Alert | Trigger |
|---|---|
| Outbound | Significant drop in delivery rate |
| Inbound | Issues delivering to your endpoint |
I’ve received an outbound delivery email alert from Plivo. What should I do?
- Review message content for spam triggers
- Check number registration status
- Verify destination numbers are valid
- Total messages sent in past hour
- Phone numbers with low delivery
- Suggested actions
I’ve received an inbound delivery email alert from Plivo. What should I do?
- Check endpoint availability
- Verify URL configuration
- Review server logs for errors
- Checks delivery rate every 15 minutes
- Looks at messages from past hour
- Alerts if delivery issues detected
Why did my outbound SMS delivery fail?
Common causes:- Carrier filtering
- Invalid numbers
- Content violations
- Endpoint timeout
- Server errors (5xx)
- Invalid URL configuration
What content is prohibited in messaging?
- Unsolicited messages (spam)
- Fraudulent or deceptive content
- Violence, hate speech, obscenity
- Illegal drugs or substances
- Marketing to children under 13 (requires extra carrier review)
What is age gating and when is it required?
Messages with age-restricted content (SHAFT: Sex, Hate, Alcohol, Firearms, Tobacco) must include age verification before opt-in.What are the best practices for messaging compliance?
Consent
- Obtain explicit opt-in before messaging
- Document consent method and timestamp
- Honor opt-outs immediately
Content
- Avoid spam triggers
- Include sender identification
- Provide opt-out instructions
Record Keeping
- Maintain opt-in records
- Log opt-out requests
- Document consent methods
What are the penalties for messaging compliance violations?
Violations of messaging standards or Acceptable Use Policy result in penalties.Penalty Tiers
| Tier | Violation Type | Fine |
|---|---|---|
| Tier 1 | Phishing, smishing, social engineering | $2,000 USD |
| Tier 2 | Illegal content | $1,000 USD |
| Tier 3 | Other violations (including SHAFT content) | $500 USD |
Consequences
- Single violation: SID or campaign suspension
- Serious violation: All SIDs/campaigns suspended without notice
- Repeated violations: Account suspension