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twilio-email-deliverability-advisor

Diagnose email deliverability issues for the Twilio Email API at comms.twilio.com.

5.3k|765|Updated Mar 4, 2026
Search Tags:#email deliverability#spam#spf#dkim#dmarc#bounce rate#Twilio
One-click install
npx skills add https://github.com/openai/plugins --skill twilio-email-deliverability-advisor
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: twilio-email-deliverability-advisor
Source: https://github.com/openai/plugins/tree/main/plugins/twilio-developer-kit/skills/twilio-email-deliverability-advisor
Command: npx skills add https://github.com/openai/plugins --skill twilio-email-deliverability-advisor

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Developers sending email through the Twilio Email API often face messages landing in spam, high bounce rates, or blocked delivery, and lack SendGrid-style tooling to diagnose why. This Skill provides a structured diagnostic workflow tailored specifically to the Twilio Email platform.

Core Features & Use Cases

  • Platform Detection: Distinguishes Twilio Email (Account SID/Auth Token, comms.twilio.com) from SendGrid (SG. API keys, app.sendgrid.com) and redirects SendGrid users to the correct skill.
  • Foundation Checklist: Covers SPF, DKIM, and DMARC authentication requirements, list hygiene practices, and healthy thresholds for bounce and spam complaint rates.
  • Platform Limitation Guidance: Documents what Twilio Email does not offer (no SEQ score, no IP pool UI, no dedicated IPs on standard plans) and where to get help.
  • Use Case: A developer notices their Twilio Email API messages are going to spam. The Skill walks them through authentication checks, bounce rate thresholds, and produces a structured diagnosis with prioritized fixes.

Quick Start

Ask the assistant to diagnose why emails sent through the Twilio Email API are landing in spam instead of the inbox.

Frequently Asked Questions about twilio-email-deliverability-advisor

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I fix Twilio emails going to spam?▼

Start by verifying SPF, DKIM, and DMARC authentication for your sending domain in the Twilio Console. Then check list hygiene: remove hard bounces immediately, use double opt-in, and keep spam complaint rates below 0.08%.

What is the difference between Twilio Email API and SendGrid deliverability tooling?▼

Twilio Email API lacks SendGrid features like Engagement Quality Scores, IP pool management, and email address validation. SendGrid users should use the twilio-sendgrid-deliverability-advisor skill, which has platform-specific tooling.

Does Twilio Email API support dedicated IP addresses?▼

Dedicated IPs are not available on the standard Twilio Email API plans. You need to contact Twilio Sales for enterprise options if dedicated IP sending is required for your volume.

What bounce rate is acceptable for email sending?▼

A healthy hard bounce rate is under 1%, with 1-2% as a warning zone and above 2% critical. Spam complaint rates should stay below 0.08%, with anything over 0.1% considered critical.

Is DMARC required for sending bulk email?▼

DMARC is required for senders exceeding 5,000 messages per day to Gmail, Yahoo, Microsoft, and Apple, and over 1,000 per day for Orange. SPF and DKIM are required at all sending volumes.

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