Documentation

CMass Guides

12 step-by-step tutorials covering every feature — from your first campaign to advanced follow-up sequences.

Getting Started

Send your first campaign in 5 minutes

Install CMass, open a Gmail compose window, import a contact list, and launch your first bulk email campaign — step by step.

Importing Recipients

The fastest way to add recipients: paste a list of emails — one per line — with optional first name and last name.

Upload any CSV with an Email column. CMass reads first name, last name, company, and any custom columns automatically.

Link a Google Sheet directly — no download needed. CMass reads your columns live and maps them to merge tags.

CMass builds a contact list from your Gmail history. Browse, search, and add contacts you've already emailed.

Writing Templates

Use {first_name}, {company}, and any custom column from your sheet to make every email feel one-to-one.

Turn on AI personalization and Claude writes a unique, context-aware opening line for every contact — automatically.

Add hosted images or clickable YouTube/Vimeo thumbnails to your campaigns directly from the CMass editor.

Follow-ups & Sequences

Add follow-up stages that fire automatically if a recipient doesn't reply — with conditions, delays, and per-stage copy.

Sending & Scheduling

Preview how your email will look with real merge tag values — and send a test to yourself before going live.

Send now or at a specific time. Set a daily cap, pause between emails, and skip weekends to protect your sender score.

Analytics

Understand what happens after you hit send — who opened, who clicked, who replied, and who bounced.

Free plan · No credit card · 50 emails/day