How do I send emails without running my own mail server?

You have a few good options, depending on whether you mean sending from an app/website or sending as a personal mailbox.

1) Use a transactional email service

Best for apps, contact forms, password resets, receipts, and other automated email.

Popular services:

• Amazon SES
• SendGrid
• Mailgun
• Postmark
• SparkPost

How it works:

1. Sign up for the service.
2. Verify your domain.
3. Set up DNS records like SPF, DKIM, and ideally DMARC.
4. Use their SMTP server or API to send mail.
5. They handle delivery, bounces, and most of the mail infrastructure.

Pros:

• No mail server to maintain
• Better deliverability than DIY setups
• Scales well

Cons:

• Costs money after free tiers
• Some setup work with DNS

2) Use your email provider’s SMTP server

Best if you want to send email from a personal or business inbox without hosting anything yourself.

Examples:

• Gmail / Google Workspace SMTP
• Microsoft 365 SMTP
• Fastmail SMTP
• Zoho Mail SMTP

How it works:

• You configure your app or email client to send through the provider’s SMTP server.
• Authentication is usually required.
• Many providers discourage or restrict automated bulk sending.

Pros:

• Simple for small volume
• Uses your existing mailbox

Cons:

• Rate limits
• Not ideal for application emails or bulk mail
• Some providers require app passwords or OAuth

3) Use an email-sending API from a SaaS platform

This is similar to #1 but often easier to integrate if you’re sending from software.

Examples:

• Postmark API
• SendGrid API
• Mailgun API
• Resend

Pros:

• Easy to integrate
• Good logs and analytics
• Built for developers

Cons:

• Vendor lock-in
• Monthly cost for larger volumes

4) Use a hosted mailbox service for a custom domain

If you want something like you@yourdomain.com without running servers:

• Fastmail
• Google Workspace
• Microsoft 365
• Zoho Mail
• Proton Mail (with some limitations for SMTP use)

You still need:

• Domain registration
• DNS setup
• Mailboxes hosted by the provider

What I recommend

• For apps/websites: use Postmark, SendGrid, Mailgun, or Amazon SES
• For personal/business email: use Google Workspace, Fastmail, or Microsoft 365
• For simple low-volume sending: use your provider’s SMTP

Important deliverability basics

To avoid spam folders:

• Set up SPF
• Set up DKIM
• Set up DMARC
• Use a real domain
• Avoid sending spammy content
• Warm up new domains/IPs if sending in volume

If you want, I can help you choose the best option based on your use case:

• personal email
• website contact form
• app notifications
• newsletters
• bulk email