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Cold Emails Going to Spam? 7 Fixes That Work - LeadGrow AI
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Verify every email address before sending. Use a verification service (NeverBounce, ZeroBounce, MillionVerifier). Cost is roughly $3 to $5 per 1,000 emails verified. Cheap insurance. “Set up bounce monitoring in your sending tool. Get alerts when bounce rate exceeds 3% on any campaign.” Remove bounced addresses immediately. Don't retry them. A hard bounce means the address doesn't exist. Retrying damages your reputation further.
Too many links. One link maximum in cold emails. Two at the absolute most (one in body, one in signature). Every additional link increases your spam score. Tracking links from your sending tool count as links. “Cold emails should look like emails a person would type. Not marketing newsletters with images, buttons, colored backgrounds, and custom fonts. Plain text or minimal HTML only.” Images in cold emails. Adding images to a cold email is almost always a mistake. Images increase email size, trigger HTML rendering, and often contain tracking pixels that spam filters flag. If you need to share something visual, link to it.
Fix 1: Set up email authentication properly “This is the first thing to check. Every time. Without exception.” Three DNS records need to be configured correctly on every domain you send from: SPF, DKIM, and DMARC.
This is the first thing to check. Every time. Without exception. “Three DNS records need to be configured correctly on every domain you send from: SPF, DKIM, and DMARC.” SPF (Sender Policy Framework) tells receiving servers which mail servers are authorized to send from your domain. Without it, your emails look like they could be from anyone pretending to be you.
Three DNS records need to be configured correctly on every domain you send from: SPF, DKIM, and DMARC. “SPF (Sender Policy Framework) tells receiving servers which mail servers are authorized to send from your domain.” DKIM (DomainKeys Identified Mail) adds a cryptographic signature to every email. It proves the email wasn't tampered with in transit and really came from your domain.
This is the biggest misconception in cold email. A campaign underperforms. Reply rates are low. Open rates are suspiciously low. The instinct is to rewrite the email, change the subject line, add more personalization, try a different angle. “Authentication, domain reputation, sending volume, warmup status.” Here are 7 fixes that actually work. In order of priority.
This is the biggest misconception in cold email. A campaign underperforms. Reply rates are low. Open rates are suspiciously low. The instinct is to rewrite the email, change the subject line, add more personalization, try a different angle. “infrastructure first, copy second. Always.” Here are 7 fixes that actually work. In order of priority.
New domains and new inboxes have zero reputation. Email providers don't know if you're legitimate or a spammer. They default to suspicion. “Warmup builds reputation gradually by sending and receiving emails automatically, creating positive engagement signals (opens, replies, moving from spam to inbox) that tell providers this is a real account used by a real person.” Action steps
Across our 1,626+ campaigns, the benchmarks for healthy deliverability are: “Inbox placement rate: 90%+ (this means 90% or more of your emails land in the primary inbox, not spam or promotions)” Bounce rate: Under 3%
Inbox placement rate: 90%+ (this means 90% or more of your emails land in the primary inbox, not spam or promotions) “Bounce rate: Under 3%” Spam complaint rate: Under 0.1%
Bounce rate: Under 3% “Spam complaint rate: Under 0.1%” Authentication pass rate: 100% (SPF, DKIM, and DMARC all passing on every email)
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