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Guides on deliverability, warmup, authentication and blacklists, written for people who send cold email.
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
Why Are My Cold Emails Going to Spam? 12 Causes and How to Fix Them
Cold emails landing in spam? The 12 most common causes, from missing DMARC and cold domains to bad lists and tracking links, and how to fix each.
Oct 16, 2026 · 4 min read
Best Tools for Monitoring Your Email Sender Reputation
Email sender reputation is essentially a score that Internet Service Providers (ISPs) and email service providers (ESPs) assign to your domain and IP address to determine whether your emails should be delivered to the inbox or marked as spam.
Sep 8, 2024 · 7 min read
28 articles
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