Post SMTP Compatibility & Integrations Post SMTP integrations allow you to connect the plugin with your favorite mailer SMTPs and email automation tools so that you can simplify workflows and grow your business. Sendinblue Build customer relationships with an all-in-one digital marketing toolbox. Mandrill Start sending emails with Mandrill's quick-start SMTP Integration. gmail-logo Gmail Google Gmail is an email service developed by the company Google. Mailgun Mailgun's email API service helps you send, validate, and receive emails. SendGrid SendGrid uses cloud-based platform to deliver your transactional & marketing emails. SparkPost SparkPost is a cloud-based email delivery service that allows businesses to send transactional and marketing emails at scale. all logo PostMark Postmark is a cloud-based email delivery service that provides a reliable and secure way to send transactional emails. all logo Office 365 Office 365 SMTP relay uses a connector to authenticate the mail sent from your device or application. all logo Amazon SES Amazon SES is a highly scalable email service designed for businesses and developers to send marketing, transactional, and other types of email communications. all logo Zoho Mail Zoho Mail provides SMTP servers that you can use to send emails from your Zoho Mail account using your preferred email client or app.