How to Set Up Dual SMS and Email Opt-In
Why Dual Opt-In Matters
Single-channel capture is risky. If you only capture an email address and the lead never opens their email, you have lost them. If you only capture a phone number and the lead has text notifications silenced, your message sits unread. Dual opt-in gives you two independent paths to reach each lead.
SMS and email also serve different purposes in the follow-up process. SMS is best for urgent, time-sensitive messages: appointment confirmations, flash offers, and quick check-ins. Email is best for longer content: detailed proposals, resource links, and newsletter-style nurture sequences. Having both channels lets you use each one for what it does best.
On this platform, the SMS Broadcast app handles text messages and the Email Broadcast app handles email. Contact records in the broadcastData table can store both phone number and email address, so a single lead record supports both channels.
Step-by-Step Setup
In the Lead Generation app, create a capture form that includes both a phone number field and an email address field. You can make both required or make one required and one optional depending on which channel is more important to your follow-up strategy.
Your form needs clear consent language that covers both SMS and email communication. Something like: "By submitting this form, you agree to receive text messages and emails from [Business Name]. Message and data rates may apply. Reply STOP to opt out of texts. Unsubscribe link included in all emails." This language satisfies TCPA requirements for SMS and CAN-SPAM requirements for email. See TCPA Compliance Guide for detailed SMS consent rules.
Set up an automated SMS that sends immediately when the form is submitted. Keep it short and useful: "Hi [Name], thanks for reaching out! We received your information and will be in touch shortly. Reply HELP for assistance or STOP to opt out." This confirms the opt-in and establishes the SMS channel.
Set up a welcome email that sends within minutes of form submission. The email can be longer and more detailed than the SMS. Include a summary of what the lead can expect, links to relevant resources, and contact information for your team. Make sure the email includes an unsubscribe link.
Create follow-up sequences that use both channels strategically. For example: Day 1 SMS confirmation, Day 1 email with detailed info, Day 3 SMS check-in, Day 7 email with case study, Day 14 SMS special offer. Alternate between channels so you stay visible without overwhelming either inbox. See How to Combine Email and SMS in One Drip Sequence.
Best Practices for Dual Opt-In
Do Not Send Duplicate Content
The worst thing you can do with dual channels is send the exact same message as both a text and an email. Each channel should deliver unique value. Use SMS for short, actionable messages and email for detailed content. If you send the same message twice, leads will feel spammed and unsubscribe from one or both channels.
Respect Channel Preferences
Some leads will opt out of one channel but keep the other. When someone replies STOP to your texts, continue sending emails normally. When someone unsubscribes from emails, keep sending texts if they have not opted out of SMS. The suppression lists for SMS and email are separate. See How to Handle STOP Requests and How to Manage Unsubscribes.
Use Phone Number Validation
Validate phone numbers at the point of capture to prevent fake or invalid numbers from entering your SMS list. Carrier lookup can verify that a number is a real mobile phone that can receive text messages. This prevents wasted SMS credits on landlines and invalid numbers.
Compliance Considerations
Dual opt-in means you need to comply with both SMS regulations (TCPA, 10DLC) and email regulations (CAN-SPAM, GDPR if applicable) simultaneously. The consent language on your form must cover both channels explicitly. You cannot use email consent to justify sending text messages or vice versa. Each channel requires its own clear opt-in. See SMS Consent Rules and CAN-SPAM Compliance for the specific requirements.
Capture leads with dual SMS and email opt-in for maximum reach. Set up cross-channel follow-up in minutes.
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