Master Inbox
Block Email Domains
Block one or more email domains to prevent future outreach
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
manual: User-initiated blockbounce: Auto-block from hard bouncescomplaint: Spam complaintsinvalid: 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