Nodemailer Gmail SMTP: Configuration, Email Sending, and Limitations
Blog post from Mailtrap
Nodemailer can send email through Gmail SMTP by using a Google app password, which requires enabling two-step verification, then configuring a Node.js project with Nodemailer and Gmail’s SMTP settings. The process includes initializing a project, installing dependencies, setting up a transporter, and defining message options, while storing credentials in environment variables is recommended for security. Nodemailer supports plain-text and HTML messages, alternative content formats, multiple recipients, attachments, and pooled connections for bulk sending. Gmail SMTP has constraints including daily recipient limits, a 25 MB attachment cap, authentication and server-location issues, potential deliverability concerns, and limited support, making it more appropriate for modest transactional use than large campaigns. The text presents Mailtrap as an alternative email delivery provider, highlighting its SMTP and API integrations, higher scalability, analytics, logs, separate transactional and bulk streams, managed infrastructure, and support services.
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