Outreach2day blog

Cold email and deliverability blog

Practical guides on inbox placement, warmup, SPF, DKIM and DMARC, email tools and B2B prospecting for agencies and GTM teams.

Need a quick fix? Short deliverability answers · Providers compared · Free tools · Skills · PDF reports

GuideStep-by-step playbook

Send 100,000 cold emails a month

How to send 100,000 cold emails a month while keeping quality, engagement and conversion rates high: domains, mailboxes, warmup, leads, copy and scaling

Updated 19 min read

Deliverability

21 articles
  • DeliverabilityUpdated 9 min read

    Azure Inboxes for Cold Email: What You Buy in 2026

  • DeliverabilityUpdated 8 min read

    Microsoft 365 Cold Email After MC1454397: New-Tenant Limits

  • DeliverabilityUpdated 8 min read

    Google Postmaster Tools: Setup and Dashboards Guide

  • Deliverability6 min read

    Microsoft SNDS: Setup and Reading the Data

  • DeliverabilityUpdated 12 min read

    Google Workspace SPF, DKIM and DMARC Setup

  • Deliverability7 min read

    Inbox Placement Test: How to Run One and Read It

  • DeliverabilityUpdated 9 min read

    Cold Email Deliverability 2026: What Changed, What to Do

  • DeliverabilityUpdated 9 min read

    Domains for Cold Email: How to Choose, Buy and Set Up

  • DeliverabilityUpdated 7 min read

    How to Warm Up an Email: Day-by-Day Schedule

  • DeliverabilityUpdated 12 min read

    Google Workspace Sending Limits: 2,000 Emails a Day per User

  • DeliverabilityUpdated 9 min read

    Microsoft 365 and Outlook Sending Limits

  • DeliverabilityUpdated 13 min read

    Pre-Warmed Inboxes and Email Accounts: What You Get

  • DeliverabilityUpdated 7 min read

    SMTP for Cold Email: Mailbox, Relay or Self-Hosted

  • DeliverabilityUpdated 12 min read

    Email Domain Reputation Checker: 6 Tools Compared

  • DeliverabilityUpdated 15 min read

    SPF, DKIM and DMARC Test: Check Your Records

  • DeliverabilityUpdated 12 min read

    How to Improve Cold Email Open Rates

  • DeliverabilityUpdated 9 min read

    How to Avoid Spam Filters: What They Check

  • DeliverabilityUpdated 6 min read

    Spam Test Score: What It Means and How to Fix It

  • DeliverabilityUpdated 16 min read

    Best Email Warmup Tools: 10 Options Compared

  • DeliverabilityUpdated 5 min read

    Email Warmup Service: What It Does and Costs

  • DeliverabilityUpdated 8 min read

    7 Email Deliverability Best Practices

Cold email

17 articles
  • Cold emailUpdated 8 min read

    Follow-Up Email Templates for Sales: 14 Situations

  • Cold emailUpdated 13 min read

    Cold Email Subject Lines: Examples, Rules and Spintax

  • Cold emailUpdated 9 min read

    What Is Cold Email? Definition, Rules and How It Works

  • Cold emailUpdated 9 min read

    How Much Does Cold Email Cost? Line Items and Examples

  • Cold emailUpdated 14 min read

    Cold Email Follow-Up Sequence: Timing, Count and Templates

  • Cold emailUpdated 12 min read

    Cold Email Agencies: How to Run Infrastructure per Client

  • Cold emailUpdated 6 min read

    15 ChatGPT Prompts for Cold Email Operations

  • Cold emailUpdated 6 min read

    15 Claude Code Prompts for Cold Email

  • Cold emailUpdated 6 min read

    15 Claude Prompts for Cold Email

  • Cold emailUpdated 5 min read

    15 Cursor Prompts for Cold Email

  • Cold emailUpdated 5 min read

    15 Gemini Prompts for Cold Email

  • Cold emailUpdated 5 min read

    15 Grok Prompts for Cold Email

  • Cold emailUpdated 5 min read

    15 Mistral Le Chat Prompts for Cold Email

  • Cold emailUpdated 7 min read

    Triage Cold Email Replies With an AI Assistant

  • Cold emailUpdated 10 min read

    10 Cold Email Best Practices That Get Replies

  • Cold emailUpdated 18 min read

    12 Cold Email Templates and Samples for Sales

  • Cold emailUpdated 7 min read

    How to Set Up Cold Email Infrastructure

Email tools

75 articles
  • Email tools5 min read

    Cheap Inboxes Pricing 2026: $2.80 to $3.50, Azure $18

  • Email tools5 min read

    Hypertide Pricing 2026: Entra $25 a Domain, Google $3.30

  • Email tools4 min read

    Mailreef Pricing 2026: $249 a Server + $0.001 a Send

  • Email tools4 min read

    Mailscale Pricing 2026: Hidden on the Site, $79 to $249

  • Email toolsUpdated 5 min read

    Icemail Pricing 2026: $2.50 a Mailbox, Azure $29, SMTP $49

  • Email toolsUpdated 5 min read

    Mailshake Pricing 2026: $29 to $99 per User, $12 Mailboxes

  • Email toolsUpdated 5 min read

    Woodpecker Pricing 2026: From $35 a Month for 500 Prospects

  • Email toolsUpdated 9 min read

    Instantly API Guide: Keys, Rate Limits, Leads and Campaigns

  • Email toolsUpdated 4 min read

    EmailBison Pricing 2026: $599/mo for 500k Emails, Real Cost

  • Email toolsUpdated 4 min read

    GMass Pricing 2026: $29.95, $39.95 and $59.95 a Month

  • Email toolsUpdated 4 min read

    Reply.io Pricing 2026: Plans, Active Contacts and Real Cost

  • Email toolsUpdated 4 min read

    Saleshandy Pricing 2026: $41-$599/mo + $3.99 Mailboxes

  • Email toolsUpdated 4 min read

    Snov.io Pricing 2026: Free Trial, $39 to $738 a Month

  • Email toolsUpdated 9 min read

    AI SDR With MCP: Build Your Own on Claude or ChatGPT

  • Email toolsUpdated 11 min read

    Google Workspace vs Microsoft 365 vs SMTP for Cold Email

  • Email toolsUpdated 8 min read

    Mailboxes for Cold Email: A Buyer's Checklist

  • Email toolsUpdated 12 min read

    Google Workspace Alternatives for Cold Email

  • Email toolsUpdated 13 min read

    Best MCP Servers for Cold Email and Outreach (2026), Ranked

  • Email toolsUpdated 4 min read

    InboxKit Pricing 2026: $3 a Mailbox, $3 Warmup Add-On

  • Email toolsUpdated 4 min read

    Infraforge Pricing 2026: $4 a Mailbox, Real Cost at Scale

  • Email toolsUpdated 5 min read

    Lemlist Pricing 2026: $69 Email Plan, $109 Multichannel

  • Email toolsUpdated 7 min read

    Maildoso Pricing 2026: $2.50 a Mailbox, What It Leaves Out

  • Email toolsUpdated 6 min read

    Mailforge Pricing 2026: $3 a Slot, 10-Slot Minimum ($30)

  • Email toolsUpdated 5 min read

    Mailpool Pricing 2026: $3–$5 per Inbox by Provider

  • Email toolsUpdated 4 min read

    PlusVibe Pricing 2026: $37 to $497 a Month, $4 Inboxes

  • Email toolsUpdated 6 min read

    Premium Inboxes Pricing 2026: $3.50 to $2.80 per Inbox

  • Email toolsUpdated 5 min read

    Primeforge Pricing 2026: $4.50 a Mailbox and Real Cost

  • Email toolsUpdated 5 min read

    Salesforge Pricing 2026: $48 Pro, $96 Growth + Mailboxes

  • Email toolsUpdated 4 min read

    ScaledMail Pricing 2026: $3.50 Google Mailboxes + Limits

  • Email toolsUpdated 11 min read

    Smartlead Pricing 2026: $39–$379/mo + $4.50 Mailboxes

  • Email toolsUpdated 6 min read

    Zapmail Pricing 2026: $39 for 10 Mailboxes, Real Cost

  • Email toolsUpdated 7 min read

    AI Assistants for Cold Email: What Connects and How

  • Email toolsUpdated 8 min read

    How to Connect ChatGPT to Cold Email

  • Email toolsUpdated 6 min read

    How to Connect Claude Code to Cold Email

  • Email toolsUpdated 6 min read

    How to Connect Claude to Cold Email

  • Email toolsUpdated 6 min read

    How to Connect Copilot Studio to Cold Email

  • Email toolsUpdated 6 min read

    How to Connect Cursor to Cold Email

  • Email toolsUpdated 5 min read

    How to Connect Gemini to Cold Email

  • Email toolsUpdated 5 min read

    How to Connect GitHub Copilot to Cold Email

  • Email toolsUpdated 6 min read

    How to Connect Grok to Cold Email

  • Email toolsUpdated 5 min read

    How to Connect Mistral Le Chat to Cold Email

  • Email toolsUpdated 5 min read

    How to Connect n8n AI Agents to Cold Email

  • Email toolsUpdated 5 min read

    How to Connect Windsurf to Cold Email

  • Email toolsUpdated 4 min read

    Is Outreach2day Legit? Company, Track Record and Terms

  • Email toolsUpdated 5 min read

    Outreach2day Pricing 2026: $2.50 per Mailbox, $30 Minimum

  • Email toolsUpdated 6 min read

    Outreach2day Review 2026: What It Does and What It Lacks

  • Email toolsUpdated 9 min read

    MCP for Cold Email Infrastructure: Domains and Mailboxes

  • Email toolsUpdated 16 min read

    Cold Email MCP Server for Claude Desktop, Cursor: 24 Tools

  • Email toolsUpdated 8 min read

    Instantly and Smartlead MCP Servers for Claude

  • Email toolsUpdated 8 min read

    MCP Server for Email Warmup With Claude

  • Email toolsUpdated 7 min read

    How to Buy Domains via API for Cold Email

  • Email toolsUpdated 9 min read

    Cold Email API for Domains, Warmup and Replies

  • Email toolsUpdated 6 min read

    Email Warmup API: Start, Pause and Monitor

  • Email toolsUpdated 6 min read

    Add Email Accounts to Instantly or Smartlead via API

  • Email toolsUpdated 7 min read

    Email Campaign Performance Metrics: What to Track

  • Email toolsUpdated 9 min read

    How to Choose an Email Verification Program

  • Email toolsUpdated 8 min read

    Bulk Email Sender Software: How It Works and How to Choose

  • Email toolsUpdated 11 min read

    Google Workspace Email Forwarding: Setup Guide

  • Email toolsUpdated 6 min read

    Gmail SMTP Server Address, Ports and Settings

  • Email toolsUpdated 8 min read

    What Is a Flagged Email? Reminders vs Spam Flags

  • Email toolsUpdated 11 min read

    How to Manage Multiple Email Accounts in One Place (Free)

  • Email toolsUpdated 7 min read

    Email Inbox Management Software for Teams

Sales & prospecting

5 articles
  • Sales & prospectingUpdated 7 min read

    Apollo Pricing 2026: Free, $65, $99 and $119 a Seat a Month

  • Sales & prospectingUpdated 7 min read

    Clay Pricing 2026: Free, Launch $185 and Growth $495 a Month

  • Sales & prospectingUpdated 6 min read

    Lusha Pricing 2026: Free, $49.90, $69.90 and $399.90 Plans

  • Sales & prospectingUpdated 6 min read

    ZoomInfo Pricing 2026: What Is Published and Cost to Send

  • Sales & prospectingUpdated 10 min read

    How to Create Buyer Personas: A Step-by-Step Guide

See deliverability issues before they kill performance

Check each mailbox's daily inbox, spam and bounce rate, replace the weak ones early, and keep warmup, protection, and sending in one place.