Sequences
What Is a Cold Email Sequence?
Understand cold email sequence steps, delays, stopping rules and a practical three-message example.
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Email Subject Line Tester
Check length, mobile truncation, capitals, punctuation and personalization.
0 characters · Start typing Mobile cut-off ≈ 60
Subject lines that get opened
Around 35–55 characters is a useful guide, not a rule. The subject should name something the recipient recognizes — their company, a problem, a mutual context.
Use sentence case, at most one punctuation mark and no more than one emoji. Personalization tokens help only when the data behind them is clean.
Resources
Related guides
Quick reads to help you plan audiences, sending volume, sequences and measurement before launch.
Email marketing
How to Do Mailing: A Step-by-Step Professional Guide
Learn how to do mailing step by step, from audience selection and copywriting to scheduling, deliverability, sending, and measurement.
Cold email basics
Cold Email Campaign Checklist
A pre-launch cold email checklist covering audience, authentication, copy, suppression, capacity and reply handling.
From checks to campaigns