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THE GTM100x BLOG

Outbound that reaches real people.

Deliverability, cold email, and modern GTM — the technical foundations and the playbooks. No hype, no “fire your team.” Just what actually lands in the inbox and books the meeting.

Cold Email & Deliverability

SPF, DKIM & DMARC: The Complete Email Authentication Setup Guide

The three records that decide whether your cold email lands in the inbox or the spam folder — explained without the jargon, with copy-paste setup steps.

May 29, 2026·9 min
Cold Email & Deliverability

Why Your Cold Emails Go to Spam (and How to Fix It)

Eight reasons good cold emails end up in spam — and the specific fix for each. Most have nothing to do with your copy.

May 28, 2026·8 min
Cold Email & Deliverability

How to Warm Up a New Email Domain for Cold Outreach

A new domain has zero reputation — and inbox providers treat zero as suspicious. Here's the week-by-week warmup schedule that builds trust without burning the domain.

May 27, 2026·7 min
Cold Email & Deliverability

Is Cold Email Legal? CAN-SPAM, GDPR & You

Cold email is legal in most of the world if you follow a handful of rules, but CAN-SPAM and GDPR set very different bars for what compliant outreach looks like.

Jan 27, 2026·9 min
Cold Email & Deliverability

Shared vs Dedicated IP for Email Sending

A dedicated IP gives you full control over your sending reputation, but it only pays off at volume, and at low volume a shared IP is usually the smarter choice.

Jan 24, 2026·7 min
Cold Email & Deliverability

Email Seed Testing: How to Know Where You Land

Open rates cannot tell you whether your email reached the inbox or spam, but a seed test using real accounts across providers shows you exactly where you land.

Jan 21, 2026·7 min
Cold Email & Deliverability

How to Keep Cold Email Out of the Promotions Tab

Landing in Gmail's Promotions tab is not the same as landing in spam, but it still buries your cold email, and most of what puts you there is fixable.

Jan 18, 2026·7 min
Cold Email & Deliverability

Spintax in Cold Email: Helpful or Harmful?

Spintax promises to dodge spam filters by rotating your wording, but used carelessly it produces awkward, lower-quality emails that hurt the very deliverability it claims to protect.

Jan 15, 2026·6 min
Cold Email & Deliverability

Email Throttling: Sending Limits and How to Respect Them

Mailbox providers throttle senders who ramp too fast or send too much, and learning to send within their limits is the difference between landing in the inbox and getting deferred.

Jan 12, 2026·7 min
Cold Email & Deliverability

Why You Should Set Up a Custom Tracking Domain

Sharing a tracking domain with thousands of other senders ties your deliverability to their behavior, and a custom tracking domain is the cheap fix that keeps your reputation your own.

Jan 9, 2026·6 min
Cold Email & Deliverability

DMARC Policy: p=none vs quarantine vs reject

Your DMARC policy tells the world what to do with mail that fails authentication, and choosing the wrong one either leaves you exposed or quietly drops your legitimate email.

Jan 6, 2026·9 min
Cold Email & Deliverability

Your Copy Isn't the Problem. Your Deliverability Is.

Reps spend weeks A/B testing subject lines while a third of their emails never reach a human. The real bottleneck in cold outreach is almost never the writing.

Jul 10, 2025·8 min