Spintax and Content Randomization

Spintax is a syntax for substituting random variations into text. In Bulko, this is a basic tool for making each email unique, without which cold outreach will quickly end up in spam.

Basic Syntax

Use curly braces and a vertical bar:

{Hello|Hi|Greetings} {{name}}!

For each email, Bulko randomly selects one option. For 1000 emails, you'll get three different greetings distributed approximately evenly.

Nested Variations

You can nest spintax within each other:

{I work at|My company is a} {SaaS|startup|tech} and I {wanted to|would like to} discuss...

This construction will produce 24 unique variations of the same phrase.

Where to Apply

1. Email Subject — mandatory. Identical subjects for all recipients are a major trigger for spam filters.
2. Greeting — Hi/Hello/Greetings/Good day
3. Introductory phrase — "I noticed that...", "I saw your post about...", "I came across..."
4. Closing — "Thanks", "Best", "Sincerely", "Thank you"

Merge Tags

In addition to spintax, use {{name}} — the recipient's name from the CSV import will be substituted in its place. If there is no name, "there" will be substituted.

AI-rewrite on top of Spintax

Spintax provides uniqueness with ~10-50 variations. When you need to send 5000+ emails, enable additional AI-rotation. Every N emails (100 by default), AI generates a completely new subject and rewrites the body, staying within the bounds of your basic prompt. This yields thousands of unique emails from a single template.

Common Mistakes

• Empty variations — {|option} creates "either nothing, or option", which leads to broken sentences.
• Unbalanced brackets — Bulko will display a validation error before sending.
• Too similar variations — "Hello/Hi there" is almost the same word; "Hello/Greetings/Hi" is better — different styles.

The "Random" button in the campaign editor instantly shows one of the possible variations of the final email after expanding all {a|b}.