The 5 biggest mistakes I see beginners make with cold email
emmajvp · 2026-02-06 · 3,340 views
After coaching 30+ SDRs here are the cold email mistakes I see repeatedly.
1. Using their company primary domain. If your cold email domain gets blacklisted, your entire company email goes down. Always use separate domains for outbound.
2. Buying budget inboxes on shared infrastructure. Cheap SMTP inboxes share IPs with hundreds of other senders. One bad sender tanks everyone deliverability.
3. Not warming up inboxes properly. Sending cold emails from a fresh inbox is like sprinting before stretching. At minimum 14 days of warmup before any cold sends.
4. Writing emails that are too long. Your first cold email should be under 80 words. Nobody reads a novel from a stranger.
5. Giving up too early. Cold email is a volume and iteration game. Your first month will be rough. By month 3 you will have enough data to optimize. By month 6 you will have a repeatable system.
Fix your infrastructure first (use dedicated Google Workspace inboxes with proper SPF DKIM DMARC), write short personalized emails, and be patient. Cold email works if you do it right.
Comments (3)
warmup_wiz · MailReach · 2026-01-10
Classic case of sending too much too fast. Let me guess — you skipped warmup and went straight to high volume? The safe range is 15-20 emails per inbox per day, and you need at least 14 days of warmup before sending anything. 20 domains burned means you probably sent hundreds of emails from fresh inboxes. Expensive lesson.
noobsender · 2026-01-11
I did this exact thing 6 months ago. burned through like 15 domains before I learned my lesson. now I never send more than 18 per inbox per day and always warm up at least 14 days. haven't burned a single domain since
coldkingdom · 2026-01-12
also keep it to 3 inboxes per domain max. if you were cramming 5-10 inboxes on a single domain that alone would torch it. and always always always use separate domains from your main business domain. sorry for your loss tho lol