Skill

twilio-sendgrid-email-settings

Name: twilio-sendgrid-email-settings
Author: OpenAI

configure SendGrid email settings

Published by OpenAI Updated Jun 30

Covers SendGrid API Development Email

Description

Configure SendGrid dynamic templates (Handlebars), tracking settings (opens, clicks, subscriptions), link branding for custom tracking domains, and content types (HTML, plain text, AMP). Use when customizing SendGrid email content, tracking behavior, or branded links. Requires a SendGrid API key (SG.-prefix) — not applicable to the Twilio Email API (comms.twilio.com).

SKILL.md

Overview

SendGrid email settings control how your messages are constructed, personalized, and tracked. Most configuration happens in the SendGrid Console, but templates and tracking can also be managed via API.

Dynamic Templates

Templates use Handlebars syntax and are managed in Console > Email API > Dynamic Templates. Template IDs start with d-.

Supported Handlebars helpers:

Helper	Use	Example
`if` / `unless`	Conditional	`{{#if premium}}Welcome back!{{/if}}`
`each`	Iteration	`{{#each items}}{{this.name}}{{/each}}`
`equals` / `notEquals`	Comparison	`{{#equals status "active"}}...{{/equals}}`
`and` / `or`	Boolean logic	`{{#and premium verified}}...{{/and}}`
`greaterThan` / `lessThan`	Numeric	`{{#greaterThan count 5}}...{{/greaterThan}}`
`length`	Array/string	`{{length items}}`
`formatDate`	Date format	`{{formatDate date "MM/DD/YYYY"}}`
`insert`	Module insert	`{{insert "module_name"}}`

NOT supported: Custom helpers, inline partials, lookup, log, with, blockHelperMissing. SendGrid implements a subset of Handlebars.js.

Template Versions

Dynamic templates (IDs starting with d-): Support Handlebars
Legacy transactional templates: Use -substitution- syntax — not interchangeable with Handlebars

Tracking Settings

Setting	What it does	Caveat
Open tracking	Inserts a tracking pixel	Unreliable: Apple Mail Privacy Protection inflates opens; image-blocking clients produce false negatives
Click tracking	Rewrites URLs through SendGrid's redirect	Can trigger spam filters on some domains
Subscription tracking	Adds unsubscribe footer	Required for CAN-SPAM compliance
Google Analytics	Adds UTM parameters	Only for marketing campaigns

Configure per-message or account-wide in Console > Settings > Tracking.

Link Branding (Custom Tracking Domains)

By default, click-tracked links route through url####.ct.sendgrid.net. Link Branding lets you use your own domain (e.g., links.yourdomain.com) instead, which improves deliverability and builds trust.

Setup: Console > Settings > Sender Authentication > Link Branding

Requires a CNAME DNS record pointing your subdomain to sendgrid.net. Validate via API: GET /v3/whitelabel/links/{id}/validate

Content Type Priority

When sending multiple content types, email clients display in this priority:

text/x-amp-html (AMP — only in supporting clients, requires sender registration)
text/html (standard — most clients)
text/plain (fallback)

Always include at least text/plain and text/html.

CANNOT

Cannot use custom Handlebars helpers — Only the built-in set listed above.
Cannot guarantee open tracking accuracy — Pixel-based tracking is fundamentally unreliable. Do not use for business-critical logic.
Personalizations subject is a plain string override — It bypasses the template subject. To use dynamic subjects, set Handlebars variables (e.g., {{{subject}}}) in the Dynamic Template's subject field and pass values via dynamic_template_data.
Undefined template variables are silent — Missing keys in dynamic_template_data render as empty strings with no error.

Next Steps

Send email: twilio-sendgrid-email-send
Delivery tracking: twilio-sendgrid-webhooks
Manage bounces/unsubscribes: twilio-sendgrid-suppressions

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