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Guides on deliverability, warmup, authentication and blacklists, written for people who send cold email.
Can You Send Cold Email From a Free Gmail Account?
No. Free Gmail accounts have low sending limits, no domain authentication you control and a high suspension risk. Use Google Workspace on separate domains instead.
Oct 26, 2026 · 3 min read
Open Tracking, Click Tracking and Custom Tracking Domains: What They Do to Cold Email Deliverability
Open and click tracking add an image and rewritten links to every cold email. What each one costs you in deliverability, and when a custom tracking domain helps.
Oct 26, 2026 · 7 min read
How to Check If Your Emails Are Going to Spam (5 Ways)
Five ways to check whether your emails land in spam: a placement test, seed inboxes, Google Postmaster Tools, reply-rate drops and authentication checks.
Oct 19, 2026 · 3 min read
Should You Use a Separate Domain for Cold Email?
Yes. Send cold email from separate lookalike domains, never your main one, so a deliverability problem can't reach your team email. How to set them up.
Oct 19, 2026 · 3 min read
What Is a Good Bounce Rate for Cold Email?
Under 2% is good for cold email, 2 to 5% needs attention and over 5% is damaging your reputation. Hard vs soft bounces, and how to keep your bounce rate low.
Oct 19, 2026 · 3 min read
The Cold Email Deliverability Checklist: 25 Checks Before You Hit Send
A 25-point cold email deliverability checklist: domains, SPF, DKIM and DMARC, inbox setup, warmup, list quality, copy and monitoring.
Oct 16, 2026 · 3 min read
Gmail, Yahoo and Microsoft Sender Requirements Explained
What Gmail, Yahoo and Microsoft Outlook require from senders: SPF, DKIM, DMARC, alignment, one-click unsubscribe and spam rates, for cold email.
Oct 16, 2026 · 3 min read
Google Workspace Sending Limits: How Many Cold Emails Can You Send Per Day?
Google Workspace allows 2,000 emails a day per user, but safe cold email volume is 30 to 50 per inbox. The real limits and how to scale past them.
Oct 16, 2026 · 3 min read
How Long Does Email Warmup Take? A Realistic Week-by-Week Timeline
Most new inboxes need 2 to 4 weeks of warmup before cold email. A realistic week-by-week schedule, what speeds it up, and why to never switch it off.
Oct 16, 2026 · 3 min read
How Many Mailboxes and Domains Do You Need for Cold Email? (With Formula)
A simple formula for how many inboxes and domains you need for your cold email volume, with examples for 200, 500, 2,000 and 10,000 emails a day.
Oct 16, 2026 · 3 min read
30 articles
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