Cold email deliverability guides

Practical, no-hype guides to getting cold email into the inbox. Each one links to our free checker so you can test your own domain.

• Why are my cold emails going to spam?Cold emails landing in spam? Work through authentication, domain reputation, blacklists, volume and content in order, and find the actual cause before changing copy.
• SPF record: too many DNS lookups, and how to fix itSPF permerror too many DNS lookups? Learn the 10-lookup limit, which mechanisms count, and practical ways to get back under it without breaking your email.
• DMARC policy for cold email: what to publish and whenWhich DMARC policy should a cold email domain use? A plain-English guide to p=none, quarantine and reject, alignment, reports and a safe rollout.
• How to warm up a domain for cold emailA realistic guide to warming up a new cold email domain: authentication first, low steady volume, gradual ramp, what to watch, and when to slow down.
• How to check if your domain is blacklistedLearn how to check whether your sending domain or IP is on an email blocklist, what Spamhaus, SURBL and others mean, and how to get delisted properly.
• DKIM selector not found in Google Workspace: how to fix itGetting 'DKIM selector not found' or 'no DKIM record' for Google Workspace? Generate the key, publish the TXT record at the right name and start authentication.
• Cold email deliverability checklistA practical cold email deliverability checklist covering domain setup, SPF, DKIM, DMARC, warm-up, list hygiene, opt-outs and ongoing monitoring.
• Using a separate domain for cold email: why and howWhy many senders use a secondary domain or subdomain for cold email, how to pick one, how to set it up, and the trade-offs to know before you do.
• Cold email spam complaint rate: what to aim for and how to track itWhat spam complaint rate is safe for cold email? Gmail and Yahoo's 0.3% limit, how to read Postmaster Tools, and how to lower complaints.