Easily connect and send your website emails with our SMTP relay and Email API to ensure maximum deliverability, reliability, and scalability.
Learn how to send transactional emails from a Retool admin panel using SendLayer’s SMTP for reliable delivery and full control.
This comprehensive guide walks you through setting up an SMTP resource in Retool, building a refund confirmation panel, and triggering dynamic emails in response to user actions.
Looking for the best email API provider in 2026? We tested SendLayer, Postmark, Mailgun, SendGrid, Amazon SES, and more to find the fastest, cheapest, and easiest options.
This guide breaks down real-world deliverability, pricing at scale, and integration complexity—so you don’t pick a tool that hurts your inbox rates or blows up your costs.
Whether you’re building a SaaS, running WordPress, or sending millions of emails, you’ll find clear recommendations based on your exact use case.
Learn how to send authentication emails in NextAuth using SMTP or an email API like SendLayer.
This comprehensive guide walks you through configuring the NextAuth Email provider, setting up magic link authentication, and choosing between SMTP and API-based delivery.
Send secure, passwordless login emails, customize templates, and troubleshoot common issues.
If you’ve just set up a new website or you’re starting a business, it’s natural to want to kick off your marketing strategy with an email campaign.
But sending promotional emails (or even transactional emails) from a brand new domain with no reputation may result in them being marked as spam.
In this post, we explain exactly how to warm up a new domain for sending email and go over some other best practices to ensure your emails reach the inbox.