DM Rate Limits & Spam Prevention

1. Objectives

Vibble’s DM Rate Limits & Spam Prevention safeguards are designed to:

• Prevent mass unsolicited messaging and spam bots
• Mitigate scams, phishing, and fraudulent contact
• Protect infrastructure and ensure service reliability
• Maintain a healthy, human-centric communication environment

2. DM Rate Limits

Vibble applies dynamic rate limits to DMs, including:

• Per-minute and per-hour limits on new DM threads
• Daily caps on the number of unique recipients a user can contact
• Lower limits for new or unverified accounts
• Stricter caps for accounts with prior spam or abuse history

These limits may be adjusted over time based on risk assessments and system performance.

3. Spam & Automation Detection

Vibble uses behavioral and content signals to identify likely DM spam, such as:

• Large bursts of identical or highly similar messages
• Links to known malicious or phishing domains
• Patterns of repeated contact to non-responsive users
• Use of unauthorized automation tools or scripts

Accounts exhibiting abusive patterns may have DM abilities temporarily or permanently restricted.

4. New Accounts & High-Risk Profiles

To reduce abuse:

• New accounts may have very limited DM capabilities until they establish trust signals
• Accounts without verified email/phone may face stricter messaging limits
• Accounts reported repeatedly for spam may be siloed or blocked from sending DMs at all

5. User-Level Protections

Users can protect themselves from DM spam by:

• Restricting DMs to followers only
• Blocking accounts that send unsolicited or unwanted messages
• Reporting spam so Vibble can act on pattern-based abuse

6. Enforcement Actions

DM spam and abuse may result in:

• Temporary DM sending limits
• Removal of ability to DM non-followers
• Account suspension or permanent bans for repeated or severe spam
• Verification or challenge steps (e.g. CAPTCHA, 2FA enforcement)

7. Appeals & Error Correction

If a legitimate account is mistakenly limited or flagged as spam, the owner may:

• Use in-app “Contact Support” links to explain the situation
• Email support or appeals with relevant context and evidence

Vibble will review and, where appropriate, restore normal DM functionality.

8. Contact

Abuse & Spam: abuse@vibble.to
Support: support@vibble.to
Security: security@vibble.to