Free Guide

B2B Cold Emailer's Deliverability Guide

Implement these proven tips to make your email channel reliable and reach the inbox every time!

01

Choose the Right Email Provider

Avoid using AWS SES and Mailgun for cold emailing, as they are designed for opt-in emails. Instead, consider using Google Workspace, Microsoft 365, or Zoho Mail for B2B cold outreach campaigns.

✓ Best Practices:

  • Google Workspace: Best for established businesses with strong reputation
  • Microsoft 365: Excellent for enterprise-level outreach
  • Zoho Mail: Cost-effective option with good deliverability
  • Avoid transactional email services like SendGrid or AWS SES for cold emails
02

Rotate Inboxes & Use Multiple Domains

To increase sending limits, utilize multiple inboxes by setting up 4-5 inboxes per domain and leveraging multiple domains. Regularly refresh domains that exhibit low performance to maintain optimal efficiency.

✓ Best Practices:

  • Set up 4-5 mailboxes per domain for optimal distribution
  • Use unlimited domains to scale your outreach safely
  • Rotate between mailboxes to spread sending load
  • Monitor domain performance and replace underperforming ones
03

Email Authentication (SPF, DKIM, DMARC)

Ensure that your SPF, DKIM, and DMARC records are properly configured. These digital signatures confirm that you had permission to send the email. Without them, the receiving server may assume you are a fraud.

✓ Best Practices:

  • Set up SPF record to authorize sending servers
  • Configure DKIM for email signature verification
  • Implement DMARC policy to protect against spoofing
  • Test all records after configuration to ensure they work
04

Warm Up Your Mailboxes

Warm up your email accounts for 2-4 weeks before launching campaigns. Gradually increase the number of emails sent per day while maintaining high engagement rates to build sender reputation.

✓ Best Practices:

  • Start with 5-10 emails per day and increase gradually
  • Aim for 4-8 weeks of warmup for new domains
  • Use automated warmup tools for consistent engagement
  • Maintain warmup even during active campaigns
05

Boost Email Deliverability

To maintain high deliverability, avoid sending emails to your 'Do Not Contact' list. Maintain consistent sending patterns by gradually increasing and decreasing your email volume. Always use email validation tools to keep your database clean.

✓ Best Practices:

  • Clean your email list regularly to remove invalid addresses
  • Respect unsubscribe requests immediately
  • Use email verification tools before sending campaigns
  • Prioritize replies over clicks for better engagement signals
06

Personalization & Unique Content

Unique emails are more likely to be delivered, and personalization can positively impact open and reply rates, thereby enhancing deliverability. Your subject line is critical as it's the first thing recipients see.

✓ Best Practices:

  • Use dynamic personalization tokens (name, company, role)
  • Utilize Spintax to create unique variations for each email
  • Craft compelling, personalized subject lines
  • Conduct A/B testing to optimize performance
07

Use Plain Text Formatting

Plain text emails generally have a higher delivery rate compared to HTML emails. Even when composing in a standard email editor, try to use more text rather than excessive HTML formatting.

✓ Best Practices:

  • Keep formatting minimal - avoid heavy HTML
  • Use simple text with line breaks for readability
  • Remove or minimize email signatures with images
  • Test plain text versions for better inbox placement
08

Avoid Spam-Triggering Words

Refrain from using spam-triggering words whenever possible, and review each email before adding it to your sequence. Words like 'free', 'guaranteed', 'act now', and excessive punctuation can trigger spam filters.

✓ Best Practices:

  • Avoid words like: free, guaranteed, urgent, limited time
  • Don't use ALL CAPS or excessive exclamation marks!!!
  • Skip overly salesy language in subject lines
  • Test emails with spam checker tools before sending
09

Optimize Email Content Elements

Minimize the use of images, including in your email signature. Unsubscribe links can lower deliverability rates but are mandatory for bulk senders and help reduce spam complaints. Limit links to one per email.

✓ Best Practices:

  • Use maximum 1-2 images, preferably none in first email
  • Include unsubscribe link for compliance and trust
  • Limit to one link per email (including signature)
  • Keep text-to-link ratio high (more text, fewer links)
10

Respect Sending Limits & Consistency

If you are sending from an inbox, limit your daily emails to 50-100 per mailbox and distribute them evenly throughout the day. Maintain consistent sending patterns to build a reliable sender reputation.

✓ Best Practices:

  • Send 50-100 emails per mailbox per day maximum
  • Distribute sends evenly throughout business hours
  • Maintain consistent daily sending volumes
  • Gradually increase volume, never spike suddenly

Quick Tips for Success

Essential knowledge for mastering B2B cold email outreach

What is B2B Cold Emailing?

B2B cold emailing is the practice of sending targeted, personalized emails to businesses or professionals with whom you have no prior relationship. Unlike spam, B2B cold emails focus on offering value and relevance to the recipient, commonly used in sales, lead generation, and networking.

When to Use B2B Cold Emailing

B2B cold emailing is most effective when connecting with specific businesses or decision-makers not responding to other channels. It's particularly useful for generating leads, building partnerships, introducing new products, expanding into new markets, or reaching key stakeholders.

B2B Cold Emailing Templates

Utilizing B2B cold email templates can streamline your outreach while ensuring consistency. Templates should include a compelling subject line, personalized greeting, clear message, and strong call-to-action. Customize each template to align with the recipient's industry and needs.

Optimal Times to Send B2B Cold Emails

The best times to send B2B cold emails are typically mid-week (Tuesday to Thursday), avoiding Mondays and Fridays. Aim for mid-morning (around 10 AM) or early afternoon (around 2 PM) when recipients are more likely to check emails during work breaks.

How Domain Reputation Impacts Deliverability

Your domain reputation is crucial in B2B cold emailing, directly affecting email deliverability and open rates. A poor reputation can lead to emails being flagged as spam. Maintain strong reputation by implementing SPF, DKIM, DMARC, avoiding spammy content, and regularly cleaning your list.

Technical Checks for Maximum Deliverability

Before sending B2B cold emails, verify your domain's health score, ensure proper SPF, DKIM, and DMARC configuration, resolve any DNS issues, and monitor your sending IP reputation. Regularly test email deliverability and adjust as needed to maintain optimal performance.

How to Write Effective B2B Cold Emails

Writing effective B2B cold emails involves crafting messages that capture attention and prompt action. Start with a personalized subject line and greeting, followed by a concise, value-driven body addressing the recipient's business needs. Use a clear call-to-action and maintain a professional tone.

Benefits of B2B Cold Emailing

B2B cold emailing offers cost-effectiveness, scalability, and direct access to potential clients. It allows for personalized outreach, provides valuable insights through feedback, and when executed correctly, can build new business relationships and drive significant growth.

B2B Cold Emailing Statistics

Personalized B2B cold emails achieve significantly higher open and response rates. Including a call-to-action can boost response rates by up to 10%. Emails sent to smaller, targeted lists tend to perform better than mass emails, highlighting the importance of personalization and strategic targeting.

Preparing Your Domain for B2B Cold Emailing

Prepare your domain by warming it up gradually, sending small batches of emails to build positive reputation. Authenticate your domain with SPF, DKIM, and DMARC records. Regularly monitor your domain's health and resolve issues promptly. Consistently clean your email list to maintain high engagement.

How to Write Follow-Up Emails

Follow-up emails are essential to increase response rates. Write concise, polite, and persistent follow-ups that remind recipients of your previous email and reiterate value. Space them 3-7 days apart, vary content to maintain interest, and personalize each follow-up based on interactions received.

Pre-Launch Deliverability Checklist

Set up SPF, DKIM, and DMARC records

Verify email authentication is properly configured

Warm up email accounts for 4-8 weeks

Build sender reputation gradually before campaigns

Set up 4-5 mailboxes per domain

Distribute sending load across multiple inboxes

Clean and verify your email list

Remove invalid addresses and duplicates

Test emails with spam checker tools

Ensure content doesn't trigger spam filters

Limit daily sends to 50-100 per mailbox

Stay within safe sending limits for cold emails

Create personalized email templates

Use dynamic fields and Spintax for uniqueness

Monitor domain and IP reputation

Check blacklists and reputation scores regularly

Plan follow-up sequence (3-5 emails)

Space follow-ups 3-7 days apart with value-add

Set up tracking and analytics

Monitor open rates, reply rates, and deliverability

Common Deliverability Issues & Solutions

Emails Landing in Spam

Causes: Missing SPF/DKIM/DMARC, spam words, low sender reputation, no warmup

Solution: Configure email authentication, warm up accounts, avoid spam triggers, maintain consistent sending patterns

Low Open Rates

Causes: Poor subject lines, wrong timing, unverified emails, low personalization

Solution: A/B test subject lines, send at optimal times (Tue-Thu 10AM-2PM), verify lists, add personalization

Domain Blacklisted

Causes: High spam complaints, sending to invalid emails, sudden volume spikes

Solution: Request delisting, clean email lists, implement double opt-in, reduce sending volume gradually

High Bounce Rates

Causes: Outdated email lists, invalid addresses, role-based emails (@info, @admin)

Solution: Use email verification tools, regularly clean lists, avoid role-based emails, maintain list hygiene

Free Tools to Boost Deliverability

Recommended

SPF Generator

Configure SPF record to authorize your email servers

Recommended

DMARC Generator

Protect your domain from spoofing and phishing attacks

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Mailbox Calculator

Calculate mailboxes and domains needed for your volume

SPF Checker

Verify your SPF record is configured correctly

DMARC Checker

Verify your DMARC policy is set up correctly

DKIM Checker

Verify DKIM signature is properly configured

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