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Knowledge base
SMS.to - Getting Started
First Steps
5
Getting started with SMS.to
SMS.to Sign-up Process
SMS.to Support Portal and Trouble Ticket Management
What kind of SMS Can I Send in the Platform
SMS.to Pricing & Discounts
Sending your first Messages and Campaigns
7
How to Send SMS to a Single Number
How to Send SMS to a List of Contacts
How to Use a Template
How to use SMS.to's Opt-Out Feature
How to use Shortlinks
See all 7 articles
Customer Account Management
5
Account creation & verification
Forgotten password & account recovery
How to Change my Account Password
How to delete my SMSto account
How to unsubscribe from SMSto's Marketing emails
FAQ - Frequently Asked Questions
15
How Many Characters Can I Send per SMS
Long Codes vs. Short Codes
How to Check SMS Logs & Status
How many messages can be delivered at what speed?
How to convert UNIX Timestamp to Date in Excel
See all 15 articles
Payments on SMSto
8
Payment Options
Failed to Process Payment
How to add funds & make a payment
Can I Request for Refund
Low balance notifications
See all 8 articles
International restrictions on Sender ID and SMS sending in general
2
International SMS Sender ID regulations and requirements (list of countries)
Why do I have to register a Sender ID?
SMS.to Integrations with third party software
Existing Integrations
7
ManyChat
C# (C Sharp) Sample Code - API
Visual Basic.NET/VB.NET Sample Code - API
Email to SMS - Forward email as SMS to your mobile number
RapidAPI
See all 7 articles
SMS.to Troubleshooting & Delivery
Delivery Issues
5
Invalid numbers & Rejected messages
My messages are not delivered & how to escalate to SMS.to support
Testing SMS delivery
My messages are delivered with a delay
Delivery quota & measuring quality of routes
Troubleshooting Guides
4
Do you charge for non-delivered SMS
How to check logs on SMS.to & find the message ID
Clearing the cache from your browser
Clearing the cache with a hard reset
SMS.to - Specific Features and Settings
Sending Process Explained
2
Sending process in detail & measuring sending speed
Invalid and inactive phone numbers
Other Features
12
Default Prefix
Restricting your account to prevent messages going out towards specific countries
Affiliate / Refer a Friend - Reward Scheme
Renting Numbers
How to enable Transcoding
See all 12 articles
Contacts, Lists & Un-/Subscription
9
General information
Importing contacts
Opt-out & Opt-in: subscribe or un-subscribe contacts
How to Create a Contact
Sending to contact lists
See all 9 articles
Number Lookup & HLR
3
How to use HLR lookup for number verification
Contact list cleaning via HLR reports
HLR strategy suggestion to eliminate inactive devices from your contacts
SMS.to Technical Documentation & API
SMSto API
4
SMS API
API Restrictions, Rules & Responses
Bulk SMS and webhooks
Secure API keys
Webhooks & callbacks
5
What are webhooks/callbacks?
Outbound message status callbacks/webhooks
Inbound message callbacks/webhooks
Opt-out callbacks/webhooks
Secure webhooks & callbacks
SMSto Maintenance & Status
1
SMSto Status page
