API Transports (SES, SendGrid, Postmark, Mailgun, Brevo, Resend)

Using an API Transport bypasses SMTP socket connections entirely. Dispatches are transmitted via direct HTTPS REST calls, providing sub-second execution and immune to web host port blocks.

Navigate to MailFuz → Settings → API Transports to configure:

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1. Amazon SES (v2 REST API)

• AWS Access Key ID: Your IAM user key with ses:SendEmail permissions.
• AWS Secret Access Key: The companion IAM secret.
• AWS Region: Select your SES region (e.g. us-east-1, eu-west-1, ap-southeast-1).

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2. SendGrid

• API Key: Generate a restricted API key in your Twilio SendGrid console with Mail Send: Full Access.
• Uses the SendGrid v3/mail/send endpoint with JSON payload formatting.

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3. Postmark

• Server API Token: Found under your Postmark Server → API Tokens tab.
• Guarantees dedicated transactional inboxing with sub-second response times.

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4. Mailgun

• Private API Key: Your Mailgun sending API key.
• Domain Name: Your verified sending domain in Mailgun (e.g. mg.yourdomain.com).
• Endpoint Region: Select US (api.mailgun.net) or EU (api.eu.mailgun.net) for European GDPR compliance.

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5. Brevo (Sendinblue)

• API v3 Key: Found in your Brevo account under SMTP & API.
• Provides 300 free emails per day with native European data sovereignty.

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6. Resend

• API Key: Create an API key starting with re_... in your Resend dashboard.
• Modern developer platform with blazing fast JSON dispatch times.