Easily connect and send your website emails with our SMTP relay and Email API to ensure maximum deliverability, reliability, and scalability.
Need to work out why your SMTP server won’t send?
Learn how to test SMTP from the command line, in the browser, and locally before you ship.
This guide covers OpenSSL and swaks commands, with a detailed explanation of what every response code means.
Not sure where transactional email ends and marketing email begins?
The line matters more than most guides admit.
This guide compares the two in terms of triggers, consent, timing, and the rules each type must follow.
Are you wondering why emails sent from your domain end up in spam?
Your emails go to spam for one of 3 reasons.
This guide explains why this happens and shares tips on how to check for and recover from emails being sent to recipients’ spam folders.
Want to add email functionality to your Node.js application?
Learn how to send emails with Nodemailer in Node.js using SMTP, with working examples for HTML emails and attachments.
This step-by-step guide covers everything from installing Nodemailer and configuring your SMTP transporter to troubleshooting authentication and connection errors.