Copy rules · email
MG-EMAIL-002
Must email machine-checkable
The rule
Subject lines stay under 60 characters and pose a stake or decision, without clickbait punctuation.
Why
Subjects that name a real decision get opened by leads who face it — which is the segmentation.
Applies to
email-sequence
This rule is enforced by POST /v1/validate; violations return this rule id in the error record.
Full record
{
"id": "MG-EMAIL-002",
"category": "email",
"severity": "must",
"statement": "Subject lines stay under 60 characters and pose a stake or decision, without clickbait punctuation.",
"rationale": "Subjects that name a real decision get opened by leads who face it — which is the segmentation.",
"applies_to": [
"email-sequence"
],
"machine_checkable": true
}