v0
email
Resend or SendGrid Integration Not Sending Emails
Your v0-generated Next.js application integrates with Resend or SendGrid for transactional emails, but emails are not being delivered. The API calls appear to succeed (or fail silently), but recipients never receive the emails. No bounce notifications or error logs indicate what went wrong.
This commonly occurs when v0 generates the email sending code but does not guide you through the necessary domain verification, API key configuration, and sender authentication steps required by email providers. Without proper DNS records and verified sender identities, emails are silently dropped or sent to spam.
The issue is compounded in serverless environments where email sending functions may time out before completing, and error handling may not surface the underlying API errors.
Error Messages You Might See
Resend API error: Missing API key
SendGrid: 403 Forbidden - sender identity not verified
Email sent but not received
resend.emails.send is not a function
Domain not verified: add DNS records
Common Causes
- Domain not verified — DNS records (SPF, DKIM, DMARC) not configured for your sending domain
- API key missing or invalid — RESEND_API_KEY or SENDGRID_API_KEY not set in environment variables
- Sender email not authorized — sending from an email address not registered in the provider's dashboard
- Free tier limitations — Resend free tier only allows sending to the account owner's email address
- Serverless function timeout — email API call takes too long and the function terminates before completion
- Missing await on async call — v0 generated the send call without await, so the function exits before the email is sent
How to Fix It
- Verify your domain — add the required DNS records (SPF, DKIM) from your email provider's dashboard to your domain registrar
- Set API keys — add RESEND_API_KEY or SENDGRID_API_KEY to your .env.local and Vercel environment variables
- Use a verified sender — for Resend, use onboarding@resend.dev for testing or verify your own domain first
- Add proper error handling — wrap email sending in try/catch and log the full error response from the API
- Await the send call — ensure
await resend.emails.send()is properly awaited in your API route handler - Check spam folder — initial emails from new domains often land in spam until reputation is established
Real developers can help you.
Kingsley Omage
Fullstack software engineer passionate about AI Agents, blockchain, LLMs.
Jacek Rozanski
Senior PHP/Symfony developer and DevOps engineer with 20+ years of professional experience, running opcode.pl (web development agency, est. 2004).
Day job: I'm the sole backend developer at merketing company where I own and maintain 11 PHP/Symfony microservices on AWS (ECS Fargate, RDS, S3, CloudFront), handle the full CI/CD pipeline (Bitbucket Pipelines, Docker), and manage monitoring with Sentry and CloudWatch. These services handle high request volumes in production every month.
What I bring to AI-built apps:
- I audit and fix security issues (OWASP methodology), performance bottlenecks, and architectural problems in codebases generated by Cursor, Claude Code, Lovable, Bolt, and v0
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Tech stack: PHP 8.x, Symfony, React, Next.js, PostgreSQL, MySQL, Docker, AWS (ECS, RDS, S3, SQS/SNS, CloudFront), Terraform, Supabase. I also use AI tools daily (Claude Code, Cursor) in my own workflow, so I understand both the strengths and the gaps in AI-generated code.
Based in Poland (CET timezone). Available for async work and calls during EU/US business hours.
Luca Liberati
I work on monoliths and microservices, backends and frontends, manage K8s clusters and love to design apps architecture
ISHANTDEEP SINGH
Senior Software Engineer with 7+ years of experience in React, JavaScript, TypeScript, Next.js, and Node.js. I’ve also worked as a tech lead for startups, owning end-to-end technical execution including architecture, development, scaling, and delivery. I bring a strong mix of hands-on coding, product thinking, and technical leadership, and I’m comfortable building products from scratch as well as improving and scaling existing systems.
hanson1014
Full-stack developer experienced in fixing and deploying AI-generated apps from Lovable, Bolt.new, Cursor, and Replit. I specialize in debugging Supabase integration issues (auth flows, RLS policies, database connections), fixing broken deployments, resolving routing/blank screen problems, and cleaning up messy React/Vite codebases. I also build production apps with the Claude API and have shipped a Mac desktop dev tool (Nexterm from scratch. Based in Hong Kong, fast turnaround.
Tejas Chokhawala
Full-stack engineer with 5 years experience building production web apps using React, Next.js and TypeScript.
Focused on performance, clean architecture and shipping fast.
Experienced with Supabase/Postgres backends, Stripe billing, and building AI-assisted developer tools.
zipking
I am a technologist and product builder dedicated to creating high-impact solutions at the intersection of AI and specialized markets. Currently, I am focused on PropScan (EstateGuard), an AI-driven SaaS platform tailored for the Japanese real estate industry, and exploring the potential of Archify.
As an INFJ-T, I approach development with a "systems-thinking" mindset—balancing technical precision with a deep understanding of user needs. I particularly enjoy the challenge of architecting Vertical AI SaaS and optimizing Small Language Models (SLMs) to solve specific, real-world business problems. Whether I'm in a CTO-level leadership role or hands-on with the code, I thrive on building tools that turn complex data into actionable value.
Jaime Orts-Caroff
I'm a Senior Android developer, open to work in various fields
Stanislav Prigodich
15+ years building iOS and web apps at startups and enterprise companies. I want to use that experience to help builders ship real products - when something breaks, I'm here to fix it.
Matthew Butler
Systems Development Engineer @ Amazon Web Services
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
Why do my Resend emails not arrive?
Most likely your domain is not verified. Go to Resend Dashboard > Domains and add the required DNS records. Until verified, you can only send to the account owner's email.
Can I test email sending locally?
Yes, set RESEND_API_KEY in .env.local and send to your own email. For Resend free tier, you can only send to the email used to create your account.
How do I check if SendGrid actually sent the email?
Go to SendGrid Dashboard > Activity Feed to see the status of each email. Check for bounces, blocks, and spam reports.