High-Volume Relay

Bulk Marketing Relay Infrastructure

Transmit large volumes of promotional newsletters and broadcasts without crashing limits or suffering deliverability penalties.

Engineered Specifically for High-Volume Bulk Senders

Bulk marketing relay is a specialized, high-throughput SMTP transport engine that allows you to deliver massive promotional broadcasts to unlimited subscriber lists. By routing your newsletters through 171mails dedicated bulk pathways, you ensure high inboxing while insulating your mission-critical transactional streams from promotional spam scoring.

Why Senders Choose 171mails Bulk Relay:

  • Safe Hourly Pacing: Built-in throughput pacing based on (Monthly Volume / 20) / 20 delivers 400 active sending hours per month, preventing mailbox deferrals.
  • Dedicated IP Inclusions: 1 Dedicated IP included on Growth ($125 or ₹10,000/mo), 2 Dedicated IPs on Scale ($250 or ₹20,000/mo), and a Dedicated /29 subnet on Enterprise ($1,250 or ₹1,00,000/mo).
  • Unlimited External Contacts: No contact storage fees or subscriber surcharges. Pay only for what you send.
  • 100M+ Suppression Database: Every blast is automatically checked against our extensive database to eliminate invalid mailboxes and spam traps before transmission.
  • Seamless App Compatibility: Drop-in SMTP credentials for WordPress (WP Mail SMTP), Mailwizz, Sendy, Mumara, Laravel, and custom backends.
View Bulk Relay Plans ($25/mo | ₹2,000) → Start 14-Day Free Trial

Sub-Second Handshake

TLS 1.3 encrypted connections across ports 587, 465, 25, and 2525 with high concurrency.

Dedicated IP Rotation

Automated IP rotation distributes sending weight across clean, dedicated reputation pools.

100M+ Suppression

Instant real-time filtering of hard bounces and spam traps keeps sender scores pristine.

Flat Monthly Rates

Predictable monthly subscriptions with zero surprise overage penalties or hidden charges.