# Deliverability Test Public

Compare reply rates, bounce rates, and positive reply rates broken down by inbox type...

- Repository: https://github.com/growthenginenowoslawski/coldoutboundskills (797 stars)
- Category: Testing
- License: MIT
- Last updated: 2026-10-05
- Runs scripts: yes, review before use

## Install

Claude Code: `npx skills add growthenginenowoslawski/coldoutboundskills --skill deliverability-test-public -g -a claude-code -y`
Codex: `npx skills add growthenginenowoslawski/coldoutboundskills --skill deliverability-test-public -g -a codex -y`
Cursor: `npx skills add growthenginenowoslawski/coldoutboundskills --skill deliverability-test-public -g -a cursor -y`
Gemini CLI: `npx skills add growthenginenowoslawski/coldoutboundskills --skill deliverability-test-public -g -a gemini-cli -y`

## Description

Compare reply rates, bounce rates, and positive reply rates broken down by inbox type (SMTP / Gmail / Outlook) for a Smartlead account. Use when you want to know "which inbox type delivers best" or when debugging unexplained deliverability differences across a mixed fleet. Operates via Smartlead API only (no database required).

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# Deliverability Test, Inbox Type Comparison

Compare reply rates, bounce rates, and positive reply rates broken down by inbox type (SMTP, Gmail / G Suite, Outlook / Office365) across your Smartlead account. Use it to answer "are my Gmail inboxes performing better than my SMTP ones?" or "why is one inbox type bouncing more than the others?"

## Why this exists

Different inbox types have different deliverability characteristics:
- **Gmail / G Suite**, highest trust, fewest bounces, often best reply rates
- **Office365**, good reputation, but stricter spam filtering
- **SMTP** (Zapmail, Maildoso, Mailforge, custom), varies wildly by provider, often has higher bounces in the first 30 days of domain life

If your campaigns mix inbox types, this skill shows which type is earning its keep.

## What you need

- `SMARTLEAD_API_KEY` in env
- Optional: `--client-id=<id>` for sub-clients
- Optional: `--days=<N>` lookback (default 7)

## Steps

```bash
# Full account, last 7 days
npx tsx scripts/inbox-type-compare.ts

# Specific sub-client, 14-day lookback
npx tsx scripts/inbox-type-compare.ts --client-id=5560 --days=14

# Just show today
npx tsx scripts/inbox-type-compare.ts --days=1
```

## Output

```
Inbox Type Comparison, last 7 days

Type              Inboxes    Sent     Replies   Bounces    Reply %   Bounce %
---------------   ------   -------   -------   -------    -------   --------
G Suite               12    3,120       42        12        1.35%      0.38%
Office365             24    6,440       65        28        1.01%      0.43%
SMTP                  44   10,780       55        98        0.51%      0.91%
---------------   ------   -------   -------   -------    -------   --------
TOTAL                 80   20,340      162       138        0.80%      0.68%

The rest: https://github.com/growthenginenowoslawski/coldoutboundskills/blob/HEAD/skills/deliverability-test-public/SKILL.md