Saksham Jain

Mailforge offers shared IP mailboxes at $2/mo, Primeforge provides real Google/Microsoft at $3.50-4.50/mo. After a 60-day test, the deliverability gap is 16 points (63% vs 79%). InboxKit bridges the gap with plans from $39/mo for real accounts.

Saksham Jain14 min read

ZapMail provides real Google Workspace (plans from $39/mo). Mailforge uses shared IP at $2-3/mo. After 8 months, ZapMail wins on deliverability but InboxKit beats both with Microsoft 365 + Azure support, isolated warmup, InfraGuard monitoring, and 24+ integrations.

Saksham Jain12 min read

Both Zapmail and Primeforge offer real Google mailboxes, but Zapmail wins on warmup speed and support. InboxKit has nearly identical pricing to ZapMail ($39/$99/$299 plans) and beats both with Microsoft 365 support, isolated warmup, and InfraGuard monitoring.

Saksham Jain11 min read

ZapMail offers real Google Workspace and Microsoft 365 mailboxes with pre-warmed accounts and a clean UI, but has no monitoring, no inbox testing, and only 5 integrations. InboxKit wins on infrastructure quality with Azure mailbox support, isolated warmup, InfraGuard, and 24+ integrations at nearly identical pricing.

Saksham Jain10 min read

Primeforge focuses on Microsoft 365 mailboxes with quality domain sourcing. After testing 30 mailboxes for 3 months: 80% inbox placement, solid domain quality, but the Forge ecosystem cost adds up fast.

Saksham Jain9 min read

Mailforge offers the cheapest mailboxes in the market at $2-3/mo, but shared IP infrastructure means 60-68% inbox placement vs 80-85% with real accounts. Here is the full review with real numbers.

Saksham Jain10 min read

Maildoso offers real Google Workspace and Microsoft 365 mailboxes at competitive per-mailbox pricing with decent warmup. Solid budget option but lacks InfraGuard-level monitoring and inbox testing.

Saksham Jain8 min read

Inframail offers private email infrastructure for cold email. After testing for 3 months, here is an honest review covering deliverability, pricing, features, and how it stacks up against InboxKit.

Saksham Jain10 min read

The complete guide to setting up cold email infrastructure from scratch. Domains, DNS records, mailboxes, warmup, monitoring, and sequencer integration. everything you need in one place.

Saksham Jain14 min read

SPF records tell receiving servers which IP addresses can send email on behalf of your domain. Get it wrong and your emails go straight to spam. Here is the complete setup guide.

Saksham Jain10 min read

DKIM proves your emails were not tampered with in transit. Without it, inbox placement drops 10-15%. Here is how to set it up correctly for Google Workspace and Microsoft 365.

Saksham Jain10 min read

DMARC tells receiving servers what to do when SPF or DKIM fails. The wrong policy can get your emails rejected. Here is the correct DMARC setup for cold email domains.

Saksham Jain9 min read

Google Workspace warms up faster and has better Gmail deliverability. Microsoft 365 provides diversity and Outlook advantage. The best strategy uses both. InboxKit offers both Google and Microsoft with plans from $39/mo.

Saksham Jain11 min read

The formula: 1 domain per 50 daily emails, 2-3 mailboxes per domain. Sending 500 emails/day? You need ~10 domains and 25 mailboxes. Full calculator and strategy guide inside.

Saksham Jain10 min read

Scaling cold email requires proportional infrastructure. Here is the exact domain, mailbox, and monitoring requirements at each volume level from 100 to 10,000 sends per day.

Saksham Jain9 min read

.com is the safest domain extension for cold email. .io and .co are solid second choices. .net and .ai are acceptable. Avoid .xyz, .info, .biz, and obscure TLDs that trigger spam filters.

Saksham Jain10 min read

DNS configuration is where most cold email setups break. This guide walks through SPF, DKIM, and DMARC setup step by step, with provider-specific instructions, common mistakes, and validation tools.

Saksham Jain20 min read

Google and Yahoo's sender requirements (effective February 2024) changed cold email permanently. Here's exactly what's required, what's enforced, and how InboxKit handles compliance automatically.

Saksham Jain10 min read

Google Workspace allows 2,000 emails/day. Microsoft 365 allows 10,000. But new accounts start much lower, and exceeding limits triggers suspensions. Here are the exact numbers from Google and Microsoft's documentation.

Saksham Jain7 min read

InboxKit works with 24+ sequencer platforms. Here is how to connect your mailboxes to each one, with exact steps, connection methods, and troubleshooting tips.

Saksham Jain7 min read

Every step from buying a domain to sending your first campaign. Based on 10,000+ domain setups on InboxKit.

Saksham Jain10 min read