Cold Email Checklist

Without a specific goal you cannot measure success. 'Get more leads' is not a goal — '15 discovery calls this month from Series A fintech CTOs' is.

Sending to anyone who might buy wastes volume and burns your domain reputation. A tight ICP increases reply rates by 2-3x compared to broad targeting.

Prospects can tell instantly when an email is generic. Referencing a specific detail (a recent promotion, a podcast appearance, a product launch) proves you did your homework and dramatically increases reply rates.

A single template sent to mixed audiences performs poorly. Segmented sequences let you speak directly to each group's specific problems and language.

Cold email alone has a 1-5% reply rate. Adding a LinkedIn touchpoint before or after the email increases familiarity and can double response rates.

If your cold outreach domain gets flagged or blacklisted, your primary business email stays safe. This is the single most important infrastructure decision for cold email.

Brand-new domains have zero reputation. ISPs treat email from fresh domains as highly suspicious. Aging the domain (with light, organic traffic) builds baseline trust before you start outreach.

SPF tells receiving servers which IPs are authorized to send for your domain. Without it, your emails fail authentication checks at every major ISP.

DKIM proves your email was not altered in transit. 2048-bit keys are the current standard — 1024-bit keys are deprecated and considered weak by modern ISPs.

Google and Yahoo require a DMARC record for all senders as of February 2024. Without DMARC, your emails face rejection or spam filtering at Gmail, Yahoo, and Microsoft.

Shared tracking domains inherit the reputation of every other sender using them. A custom tracking domain isolates your reputation and prevents guilt-by-association spam filtering.

ISPs have no reputation data for new senders. Sending cold emails from an unwarmed inbox triggers spam filters immediately, often blacklisting the domain before your campaign even starts.

Sudden volume spikes are the number one trigger for ISP throttling. A gradual ramp-up mimics natural sending behavior and builds trust with receiving servers.

Sending 50 emails in 60 seconds looks like a spam bot. Random 30-120 second delays between emails mimic human sending patterns and avoid rate-limiting by ISPs.

Most cold email platforms recommend 30-50 emails per inbox per day. Exceeding this limit triggers sending throttles and damages inbox reputation faster than volume gains justify.

Warm-up is useless if your emails are going to spam during the process. Checking placement early lets you pause and fix issues before they compound into permanent reputation damage.

Subject lines over 7 words get truncated on mobile. A specific reference (their company name, a recent event) signals this is not a mass blast and increases open rates by up to 26%.

Cold prospects owe you nothing. Long emails get deleted. Under 100 words respects their time and forces you to lead with value instead of burying it in paragraphs of context.

The first sentence determines whether the rest gets read. A generic opener like 'I noticed your company is growing' signals a template. A specific reference proves relevance.

Prospects do not care about your product — they care about their problems. Lead with the pain point you solve, not a feature list. 'You' language outperforms 'we' language in every cold email study.

Social proof reduces risk perception. Saying 'we helped [similar company] increase X by 30%' is more persuasive than any feature description because it implies proven results.

'Are you open to a quick chat next week?' gets replies. 'Book a 30-minute demo at this link' feels like a commitment. Lower the bar and more prospects will engage.

A complete signature builds legitimacy and trust. Missing signatures make emails look like spam. Including a phone number signals you are a real person willing to be contacted.

Broken merge tags, formatting issues, and dead links destroy credibility with prospects who were otherwise ready to reply. A 30-second test prevents campaign-wide embarrassment.

Most replies come from follow-ups, not the first email. Studies show that sending 3 or more follow-ups can increase response rates by 28%. One email is never enough.

Too frequent and you annoy the prospect. Too slow and they forget you. A 3-day gap for the first follow-up, extending to 5-7 days for later ones, balances persistence with respect.

Repeating the same pitch gets ignored. Each follow-up should bring a new reason to reply: a different case study, a new angle on their problem, or a question that reframes the conversation.

Nothing damages trust faster than sending a follow-up to someone who already replied. Automatic stop-on-reply prevents embarrassing double-sends and keeps your sequence professional.

A well-crafted breakup email ('I will not reach out again, but if this becomes relevant...') often gets the highest reply rate of the entire sequence. It removes pressure and creates urgency simultaneously.

CAN-SPAM and GDPR both require an opt-out mechanism. Without one, recipients use the spam button instead — which damages your sender reputation far more than an unsubscribe.

CAN-SPAM requires a valid physical postal address in every commercial email. Omitting it carries penalties up to $53,088 per violation. A simple footer line keeps you compliant.

Delayed unsubscribe processing means you send to people who opted out, generating spam complaints and potential legal liability. Automate this — never process unsubs manually.

Bounces above 3% trigger ISP reputation penalties that can take weeks to recover from. Email verification services catch invalid addresses, spam traps, and catch-all domains before you send.

Words like 'guaranteed,' 'act now,' and 'limited time' trigger content-based spam filters. Combined with all-caps or multiple exclamation marks, they dramatically increase the chance of landing in spam.

Tools like Mail-Tester or GlockApps reveal content and technical issues before they affect your real reputation. Catching a problem in pre-send costs nothing — catching it after 500 sends costs weeks of recovery.

Apple Mail Privacy Protection and other privacy features inflate open rates by 30-50%, making them unreliable for cold email. Reply rate is the only metric that directly measures whether your outreach is working.

A bounce rate above 3% triggers reputation damage that compounds with every subsequent send. Pausing immediately lets you investigate and clean your list before the damage becomes permanent.

Google, Yahoo, and Microsoft enforce a 0.3% spam complaint threshold. Exceeding it triggers throttling or blocking that can take weeks to recover from. Monitor this after every batch.

Small changes in subject lines and opening sentences can double reply rates. Test one variable at a time with batches of at least 50 prospects to get statistically meaningful results.

Without systematic documentation, teams repeat mistakes and lose winning formulas. Record reply rates, positive reply rates, meeting conversion, and best-performing variants for every campaign.