Gravity SMTP integrations use the following reference slugs. These slugs are lowercase and exclude spaces or special characters. They are utilized in both constants and filters.
| Integration | Slug |
|---|---|
| Amazon SES | amazon |
| Brevo | brevo |
| Custom SMTP | generic |
| Elastic Email | elastic_email |
| Emailit | emailit |
| Google / Gmail | |
| Mailchimp Transactional | mailchimp |
| MailerSend | mailersend |
| Mailgun | mailgun |
| Mailjet | mailjet |
| Microsoft 365 / Outlook | microsoft |
| PHP Mail | phpmail |
| Postmark | postmark |
| Resend | resend |
| SendGrid | sendgrid |
| SMTP2GO | smtp2go |
| SparkPost | sparkpost |
| Zoho Mail | zoho |