Prohibited
Phishing, impersonation, credential theft, malware, or deceptive links Purchased, scraped, harvested, or unlawfully shared recipient lists
Suppression lists
Suppression lists
Hard bounces and complaints are suppressed automatically with manual overrides.
Required sender practices
Use verified domains and accurate From identities. Keep complaint and bounce rates below the limits communicated during onboarding.
Enforcement
Postline may hold, throttle, quarantine, or suspend traffic without advance notice when signals indicate risk. Serious abuse can cause permanent termination and preservation or disclosure of records where legally required.
Report abuse
Send the message headers, sending domain, received time, and a short description to abuse@srs-postline.com. Do not forward malware as an executable attachment.
POST /v1/suppressions
Authorization: Bearer srs_live_...
Content-Type: application/json
{
"email": "recipient@example.com",
"reason": "manual"
}