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Guides on deliverability, warmup, authentication and blacklists, written for people who send cold email.
Burned Cold Email Mailbox? When to Rest It, Replace It or Retire the Domain
A cold email mailbox landing in spam? How to tell whether the mailbox, the domain or the campaign is the problem, and when to rest, replace or retire it.
Nov 9, 2026 · 8 min read
Should You Buy Aged Domains for Cold Email?
Usually not. Domain age alone doesn't earn inbox placement, the mailboxes still need warmup, and an aged domain's history can work against you. When it's worth it and what to check.
Nov 9, 2026 · 3 min read
Should Your Cold Email Domain Redirect to Your Main Website?
Yes. Point every cold email domain at your main website with a 301 redirect over HTTPS, so prospects who check it find your company, not a parked page or an error.
Nov 2, 2026 · 3 min read
How to Switch Cold Email Mailbox Providers Without Losing Deliverability
Changing mailbox provider for cold email? What carries over and what starts again, keeping domains vs new domains, and a wave-by-wave plan that keeps campaigns running.
Nov 2, 2026 · 8 min read
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
34 articles
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