# Cold Email Mailbox Settings Checklist

> A checklist of mailbox configurations to maximize cold email deliverability

This list outlines key mailbox and sending configurations to prevent cold outbound campaigns from landing in spam folders. It covers technical settings, daily send thresholds, and formatting adjustments for outbound inboxes. Use it as a quick audit checklist when provisioning new sender domains and mailboxes.

## The list

1. Profile picture on every account
2. Custom tracking domains
3. Dedicated US-based IPs
4. Open/click tracking OFF
5. 10-20 cold sends per mailbox per day
6. 20-30 warm-up sends at 60% reply rate
7. Plain text signature only

## What it is for

- Configure new email inboxes before launching outbound outreach campaigns
- Audit existing sender accounts experiencing low inbox placement or deliverability drops
- Set safe warmup and daily send limits across cold email sender fleets

## Key points

- Profile picture added to every sender account
- Setup of custom tracking domains
- Usage of dedicated US-based IP addresses
- Disabling open and link-click tracking pixels
- Daily sending limits capped at 10 to 20 cold emails per inbox
- Warmup schedules targeting 20 to 30 emails daily with a 60% reply rate
- Signatures restricted to plain text without images or excessive HTML

## Pricing

Free

## Details

- Type: List
- Category: [Marketing & Sales](https://xiry.app/topics/marketing-sales.md)
- Open source: no
- Platforms: other
- For: Cold emailers, sales development reps, and outbound growth marketers
- Tags: cold email, deliverability, email outreach, sales ops, email warmup

## Why it was saved

- [@Seannywilson, 24 March 2026](https://x.com/Seannywilson/status/2036452159097573640): A checklist of mailbox settings the author claims make cold email campaigns reliable

## Related

- [Instantly](https://xiry.app/resources/instantly): Cold email outreach, inbox warmup, and B2B lead generation platform. (Web app, Freemium)
- [Cold-Email Copy Skill: Spam Guard](https://xiry.app/resources/cold-email-copy-skill-spam-guard): Prompt guardrails to remove spam triggers and hype from cold emails. (Prompt, Free)
- [lemlist](https://xiry.app/resources/lemlist): AI-powered outbound sales platform for multichannel prospecting and deliverability. (Web app, Paid)
- [Gojiberry AI](https://xiry.app/resources/gojiberry-ai): Autonomous AI sales agents for signal-based prospect research and multichannel outreach. (Web app, Freemium)
- [10,000 Cold Messages Playbook](https://xiry.app/resources/10-000-cold-messages-playbook): A data-backed B2B cold outbound playbook covering tools, sequences, and scripts. (Tip, Free)
- [Account Scoring and Signal Stacking Framework](https://xiry.app/resources/account-scoring-and-signal-stacking-framework): Four-step outbound targeting framework separating ICP fit from real-time operational triggers. (Tip, Free)

Updated 11 October 2026. Page: https://xiry.app/resources/cold-email-mailbox-settings-checklist

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