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Inbox Warming2 min read·2026-06-03

How to Use Spintax to Create Unique Email Variations

Spintax is a syntax that creates multiple variations of words and phrases in your cold emails, making each email slightly different and reducing the risk of pattern-based spam detection.

Spintax is a syntax that creates multiple variations of words and phrases in your cold emails, making each email slightly different and reducing the risk of pattern-based spam detection.

What Spintax is

Spintax uses curly braces and pipe symbols to define variations. For example: {Hey|Hi|Hello} {{firstName}} generates three different greetings across your sends. The cold email tool randomly selects one variation for each email.

Why Spintax matters for deliverability

When you send hundreds of emails with identical content, email providers detect the pattern and flag it as bulk email. Spintax introduces variation so that no two emails are exactly the same. This makes your sending pattern look more natural and reduces spam filter triggers.

Where to use Spintax

Greeting: {Hey|Hi|Hello|Hey there} Opening line variations: {I noticed|I saw|Came across} {{company}}... Value proposition variations: {We've helped|We recently helped|Our team helped} {similar companies|companies like yours|teams like yours}... CTA variations: {Would it make sense|Does it make sense|Would it be worth it} to {chat|connect|have a quick call}? Closing: {Best|Cheers|Thanks|Talk soon}

Spintax best practices

Each variation should be natural and grammatically correct. Do not create variations that change the meaning of the email. Use 3 to 5 variations per spintax block — enough for diversity but not so many that you cannot control quality. Combine Spintax with personalization variables for maximum uniqueness: "{Hey|Hi} {{firstName}}, {I noticed|I saw} {{company}} {just raised a new round|is growing fast|is expanding the team}..." Learning more about dynamic personalization: The Liquid Syntax Playbook at Warm Inboxes covers Liquid syntax for advanced dynamic email content, which can be combined with Spintax for sophisticated personalization.


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