Shared IPs—The Siren Song
Low monthly fee, pre-warmed reputation, no setup fuss. Sounds perfect until you share space with a rogue weight-loss spammer who nukes everyone’s inbox score overnight.
Quick Stat
In 2024, Microsoft SNDS showed 46 % of complaints on shared ranges traced back to just 1 % of senders. Collateral damage is real.
Dedicated IPs—Why the Price Tag Is Misleading
Yes, a /29 block plus rDNS setup costs more upfront. But one week in the spam folder can wipe out a big-room poker tournament launch worth six figures.
| Cost Center | Shared IP | Dedicated IP |
|---|---|---|
| Monthly fee | $0–$40 | $60–$120 |
| Reputation control | None | Total |
| Risk of blacklisting | High | Low |
| Long-term ROI | Unpredictable | Stable |
Hybrid Models: When Shared Can Work
If you run low volume (< 5 k/day) or send purely transactional mail, a reputable shared pool with strict entry screening can suffice. For promo-heavy casino, forex, or CBD? Hard pass.
How CloakSender Approaches It
- Micro-dedicated blocks: 4–6 IPs per client—enough to rotate, small enough to evade range-based blocks.
- Reputation clustering: Each sub-domain/IP pair handles one vertical (casino, forex) to silo risk.
- Automatic failover: A single “Poor” score triggers MX reroute in under 60 s—no human wake-up required.
Bottom Line
Shared IPs are a rounding error you’ll pay for twice: once on the invoice, again when Gmail tanks your open rate. In high-risk niches, dedicated space isn’t a luxury—it’s insurance.
