The anatomy of a perfect warmup email
Subject line nuance, body layout, plain-text parity, and the role of a clear unsubscribe.
Warmup your domain and IP with confidence
Build sender reputation the right way. Follow a structured warmup plan, align your DNS, and scale sending volume without risking deliverability.
SPF • DKIM • DMARC • PTR • TLS
Quick checklist
Authenticate: Publish SPF, DKIM, and align DMARC policy for the sending domain.
Reverse DNS: Map IP to hostname with PTR, match HELO/EHLO and rDNS.
List hygiene: Start with engaged recipients; avoid purchased and stale lists.
Content quality: Avoid spam triggers, include plain-text, and an unsubscribe link.
Monitoring: Track bounces, complaints, opens, clicks; react before scaling volume.
SMTP services and setup
PowerMTA Installation
Professional setup and configuration of PowerMTA for high-volume email delivery with optimal performance and reliability.
- Full installation & configuration
- Performance optimization
- Monitoring setup
- Support & maintenance
MailWizz Installation
Complete MailWizz email marketing platform installation with custom configurations for your specific needs.
- Full platform setup
- Custom configurations
- Integration assistance
- Training & support
IP Rotation Services
Advanced IP rotation solutions to maintain high deliverability rates and avoid spam filters.
- IP pool management
- Rotation algorithms
- Deliverability monitoring
- Reputation management
DNS records:
- SPF include sending provider, limit mechanisms
- DKIM 2048-bit key, correct selector, no whitespace breaks
- DMARC start with p=none, monitor, then tighten
- PTR reverse DNS to match HELO and visible hostname
- MX accept replies; support bounce processing
Transport & policy:
- Enforce TLS, prefer modern ciphers
- Respect rate limits per ISP domain
- Implement backoff on transient 4xx responses
- Segment transactional vs. marketing traffic
- Use dedicated IPs for high-volume marketing
Monitoring & feedback:
- Collect and parse bounces (DSNs)
- Register feedback loops (FBLs) where available
- Track blocklists and rDNS health
- Measure per-domain KPIs (Gmail, Outlook, Yahoo, etc.)
- Alert on thresholds (complaints, traps, deferrals)
New IP warmup plan
A pragmatic 4-week ramp designed for a single dedicated IP. Adjust volumes based on engagement and ISP responses. If you see elevated bounces or complaints, hold or step back a day.
Week 2: Ramp Up
Day 8–10: 750–1,000/day. Introduce light segmentation by domain.
Day 11–14: 1,500–2,500/day. Monitor bounce rates closely; pause if >1%.
Week 1: Foundation
Day 1–2: 50–100 emails/day to highly engaged users. Include plain-text and unsubscribe link.
Day 3–4: 150–250/day. Keep consistent send-time windows.
Day 5–7: 300–500/day. Monitor per-domain metrics and 4xx deferrals.
Week 3: Scale
Day 15–17: 4,000–6,000/day. Add light segmentation by engagement score.
Day 18–21: 8,000–12,000/day. Use domain-based throttling and adaptive retries.
Week 4: Stabilize
Day 22–24: 15,000–20,000/day. Maintain consistent cadence; avoid big spikes.
Day 25–28: 25,000–40,000/day. Introduce less-engaged cohorts gradually.
Guardrails:
- Bounce rate < 2%
- Complaint rate < 0.1%
- Open rate > 20% on engaged cohorts
- Pause scaling on spikes or blocklist hits
- Refresh cohorts weekly (recency and engagement)
Segmentation tips:
- Highly engaged: opened/clicked in last 30 days
- Recent: joined within 90 days
- Dormant: no open in 90–180 days (send sparingly)
- Never send: purchased lists or role-only addresses
Technical hygiene:
- Match HELO/EHLO to rDNS hostname
- Use dedicated envelope-from domain
- Rotate DKIM keys annually
- Publish DMARC reports (RUA/RUF)
- Maintain clear preference center
Blog: Articles on domain & IP warmup
Guides and deep-dives to help you plan, execute, and monitor a safe warmup strategy.
SPF, DKIM, DMARC: Alignment that actually matters
How alignment influences reputation, with examples of policy evolution from p=none to p=quarantine/reject.
Avoiding spam traps during ramp-up
List hygiene, recency filters, and engagement-based sends to minimize trap risk.
Throttling by domain: Why Gmail is not Yahoo
Per-domain behavior, response code handling, and adaptive rate limiting strategies.
Blocklists: Monitor, react, and recover
Understanding common lists, typical triggers, and step-by-step remediation flows.
Feedback loops and complaints management
Setting up FBLs, immediate suppression, and keeping complaint rates consistently low.
Contact and quick start
Get a plan tailored to your volume:
Tell us your daily target, list size, regions, and whether you need dedicated IPs for marketing vs transactional traffic.
Implementation checklist:
- Publish SPF/DKIM/DMARC (RUA reports enabled)
- Configure rDNS and match EHLO hostname
- Segment lists by engagement
- Set per-domain throttles and retries
- Enable bounce parsing and FBLs