Bulletproof Use Cases

Bulletproof VPS for Bulk Email Marketing: Sending Infrastructure Guide

Setting up legitimate bulk email sending on bulletproof VPS requires proper mail server configuration, IP warming strategy, and list management practices. This guide covers the complete technical setup for email marketing infrastructure on AnubizHost's complaint-resistant hosting.

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Mail Server Setup on Bulletproof VPS

Step-by-step mail server setup for bulk sending on AnubizHost Romania VPS:

Step 1 - Server selection: Romania VPS I (4 vCPU, 8GB RAM, 4TB bandwidth) as starting point. Port 25 must be requested to be opened - contact support to enable outbound SMTP.

Step 2 - Install Postfix:
apt install postfix postfix-pcre opendkim opendkim-tools
Configure as internet site. Set hostname to match your mail server FQDN.

Step 3 - Configure DNS:

  • A record: mail.yourdomain.com pointing to server IP
  • MX record: yourdomain.com pointing to mail.yourdomain.com
  • PTR record: IP address reverse DNS pointing to mail.yourdomain.com (request from AnubizHost support)
  • SPF record: v=spf1 ip4:SERVER_IP -all
  • DKIM: Generate key pair, publish public key as TXT record
  • DMARC: v=DMARC1; p=quarantine; rua=mailto:dmarc@yourdomain.com

Step 4 - Configure OpenDKIM: Add DKIM signing to all outbound messages. Verify with dkim.org checker.

IP Warming Schedule

IP warming schedule for new sending IPs on bulletproof VPS:

WeekDaily VolumeNotes
1500Best subscribers only, monitor complaints closely
21,000-2,000Continue with best engaged subscribers
3-45,000-10,000Begin adding newer subscribers
5-620,000-50,000Ramp to full list if complaints remain under 0.3%
7-8Full volumeMonitor complaint rate. Stay under 0.08% for Gmail

List Management for Bulletproof Sending

List management practices for sustainable bulk sending:

  • Double opt-in: Confirmation email required before adding to list. Creates documented consent evidence for counter-notice defense.
  • Bounce management: Remove hard bounces immediately. 3 soft bounces = suppress. High bounce rates (above 2%) trigger blacklisting.
  • Complaint monitoring: Enroll in Google Postmaster Tools and Yahoo Complaint Feedback Loop. Remove complainers immediately.
  • Segmentation: Send to engaged subscribers first, less engaged last. Engagement-based segmentation reduces complaint rates significantly.
  • Suppression list: Maintain global suppression list of hard bounces, unsubscribes, and complaints. Never re-add.

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Bulletproof VPS for Bulk Email Marketing 2026 - Sending Infrastructure | Anubiz Host