DeliveryKit SMTP helps you send WordPress emails using SMTP or supported mail APIs.
Free version features: * SMTP and API based email delivery * Default PHP Mail plus one configured SMTP/API connection * Email testing * Email logging * Settings import and export * Retention cleanup * Summary email reports
For more features, see DeliveryKit SMTP Pro.
External services
DeliveryKit SMTP only connects to the mail provider that you configure. No provider API requests are made until you configure and use a provider connection, complete an OAuth authorization flow, verify a provider account, send a test email, or send a WordPress email through that provider.
Google (Gmail) API
Used to authorize Gmail sending and deliver mail through the Gmail API. When this mailer is configured or used, the plugin sends OAuth requests, access and refresh tokens, sender profile lookups, and the sender, recipient, subject, message body, and attachment data required to deliver the email.
Terms: https://policies.google.com/terms Privacy: https://policies.google.com/privacy
Microsoft 365 / Outlook
Used to authorize Microsoft 365 or Outlook sending and deliver mail through Microsoft Graph. When this mailer is configured or used, the plugin sends OAuth requests, access and refresh tokens, account profile lookups, and the sender, recipient, subject, message body, and attachment data required to deliver the email.
Terms: https://www.microsoft.com/servicesagreement Privacy: https://privacy.microsoft.com/privacystatement
Zoho Mail
Used to authorize Zoho Mail sending and deliver mail through Zoho APIs. When this mailer is configured or used, the plugin sends OAuth requests, access and refresh tokens, account lookups, and the sender, recipient, subject, message body, and attachment data required to deliver the email.
Terms: https://www.zoho.com/terms.html Privacy: https://www.zoho.com/privacy.html
Transactional email provider APIs
If you configure one of the API mailers below, the plugin sends the sender, recipient, subject, message body, headers, attachment data, and the authentication credential required by that provider, such as an API key, access token, SMTP username, or SMTP password, whenever WordPress sends an email or you run a test email.
- Brevo – Terms: https://www.brevo.com/legal/termsofuse/ | Privacy: https://www.brevo.com/legal/privacypolicy/
- SendLayer – Terms: https://sendlayer.com/terms-of-service/ | Privacy: https://sendlayer.com/privacy-policy/
- SMTP.com – Terms: https://www.smtp.com/policies/terms-and-conditions/ | Privacy: https://www.smtp.com/policies/privacy-policy/
- Amazon SES – Terms: https://aws.amazon.com/service-terms/ | Privacy: https://aws.amazon.com/privacy/
- SendGrid – Terms: https://www.twilio.com/legal/tos | Privacy: https://www.twilio.com/legal/privacy
- Elastic Email – Terms: https://elasticemail.com/resources/usage-policies/terms-of-use | Privacy: https://elasticemail.com/resources/usage-policies/privacy-policy
- Mailgun – Terms: https://www.mailgun.com/terms/ | Privacy: https://www.mailgun.com/privacy-policy/
- Mailjet – Terms: https://www.mailjet.com/legal/terms/ | Privacy: https://www.mailjet.com/legal/privacy-policy/
- MailerSend – Terms: https://www.mailersend.com/legal/terms-of-use | Privacy: https://www.mailersend.com/legal/privacy-policy
- Mandrill / Mailchimp Transactional – Terms: https://mailchimp.com/legal/terms/ | Privacy: https://mailchimp.com/legal/privacy/
- Postmark – Terms: https://postmarkapp.com/terms-of-service | Privacy: https://postmarkapp.com/privacy-policy
- Resend – Terms: https://resend.com/legal/terms-of-service | Privacy: https://resend.com/legal/privacy-policy
- SMTP2GO – Terms: https://www.smtp2go.com/terms/ | Privacy: https://www.smtp2go.com/privacy/
- SparkPost – Terms: https://bird.com/terms | Privacy: https://bird.com/privacy
- Netcore / Pepipost – Terms: https://netcorecloud.com/terms-of-service/ | Email API Terms: https://netcorecloud.com/email-api-terms-and-policies/ | Privacy: https://netcorecloud.com/privacy-policy/
- Other SMTP – This mailer connects directly to the SMTP server that you enter in the plugin settings. Terms and privacy depend on your chosen mail server provider.