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Overview

Quo, formerly OpenPhone provides automatic opt-out functionality to comply with anti-spam legislation and industry standards. Recipients can easily unsubscribe from text messages using standard keywords, and the system automatically prevents future messages while allowing opt-back-in options.

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How opt-out works

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Standard opt-out keywords

Recipients can stop receiving messages by replying with any of these single-word responses:
  • STOP
  • STOPALL
  • UNSUBSCRIBE
  • CANCEL
  • END
  • QUIT
Only single-word messages trigger the opt-out. Messages like “STOP PLEASE” or “PLEASE CANCEL” will not activate the unsubscribe process.

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Automatic confirmation

When someone uses an opt-out keyword, Quo automatically sends this confirmation message:
“You have successfully been unsubscribed. You will not receive any more messages from this number. Reply START to resubscribe.”

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Account-wide blocking

Important: The opt-out applies to all Quo numbers associated with your account, not just the specific number they replied to.

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What happens after opt-out

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Message delivery prevention

Once someone opts out:
  • All future message attempts to that contact will fail
  • You’ll see a “Failed” status in Quo for attempted messages
  • The block remains in effect until they manually opt back in
Failed message status when contact has opted out

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Identifying opted-out contacts

Signs a contact has opted out:
  • Messages consistently show “Failed” delivery status
  • No response to recent messages
  • Previous successful message history suddenly stops

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Opt-back-in process

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How contacts can resubscribe

Recipients can opt back into messages by texting either keyword:
  • START
  • UNSTOP

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Resubscription confirmation

When someone opts back in, they automatically receive this message:
“You have successfully been re-subscribed to messages from this number. Reply HELP for help. Reply STOP to unsubscribe. Msg&Data Rates May Apply.”

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Restored messaging access

After opt-back-in:
  • All Quo numbers in your account can message the contact again
  • Normal message delivery resumes immediately
  • Previous conversation history remains intact

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Compliance considerations

While Quo handles automatic opt-out processing, you should consult legal counsel to ensure your text messaging practices comply with all applicable laws and regulations.

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Best practices for compliance

Include opt-out instructions:
  • Add “Reply STOP to unsubscribe” in initial messages
  • Clearly communicate how recipients can opt out
  • Honor opt-out requests immediately
Record keeping:
  • Document when contacts opt out
  • Maintain records of consent and opt-out history
  • Track resubscription events

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Industry standards

CTIA compliance:
  • Automatic keyword processing meets industry standards
  • Single-word trigger requirements follow best practices
  • Confirmation messages include required elements

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FAQs

Check if they accidentally sent a single-word message matching opt-out keywords (STOP, END, etc.). They can text START to resubscribe.
Quo’s system should automatically send confirmations. If this fails, contact support to investigate the issue with automatic message processing.
Allow a few minutes for system processing. If messages continue failing after opt-back-in, there may be other delivery issues to investigate.
Quo doesn’t provide a master opt-out list. Monitor individual conversation threads for failed message status to identify opted-out contacts.
No, contacts must opt back in themselves using START or UNSTOP keywords. This ensures compliance with anti-spam regulations.
If multiple contacts share a phone number (business lines), the opt-out applies to that number for your entire account. This is normal system behavior.