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POST
Prevent emails to specific domains. Essential for managing bounces, spam complaints, and invalid domains across all campaigns.

Overview

Blocks one or more email domains system-wide to prevent future outreach. Useful for bounce management, spam complaint handling, and maintaining sender reputation. Block Effects:
  • No future emails sent to blocked domains
  • Applies across ALL campaigns
  • Existing leads marked appropriately
  • Can be unblocked later via domain block list management
Common Block Sources:
  • manual: User-initiated block
  • bounce: Auto-block from hard bounces
  • complaint: Spam complaints
  • invalid: Email validation failures

Query Parameters

string
required
Your SmartLead API key

Request Body

array
required
Array of domain strings to block (minimum 1 domain)Examples: ["spam.com", "invalid.com", "bounces.net"]
string
default:"manual"
Block source for tracking: manual, bounce, complaint, or invalid

Response Example