Suppression lists

Prohibited

• Phishing, impersonation, credential theft, malware, or deceptive links
• Purchased, scraped, harvested, or unlawfully shared recipient lists
• Unsolicited bulk or high-risk financial and cryptocurrency promotions
• Sender-address spoofing or evasion of authentication and suppression controls
• Repeated sends to bounced, complained, unsubscribed, or otherwise suppressed recipients

Required sender practices

• Use verified domains and accurate From identities.
• Keep complaint and bounce rates below the limits communicated during onboarding.
• Provide a working unsubscribe mechanism for applicable mail and RFC 8058 one-click unsubscribe for marketing streams.
• Investigate unusual volume, credential exposure, and recipient complaints immediately.

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.