Category: Blog

A SaaS onboarding email sequence is a series of automated emails sent to new signups with one specific goal: get the user to their activation milestone, the moment they first experience the product’s core value. Not just “welcome them.” Not “show every feature.” Drive them to the aha moment that makes cancellation feel like a…

Emails go to spam for five main reasons: missing or broken authentication (SPF, DKIM, DMARC), a damaged sender reputation (high spam complaints, too many bad addresses), low recipient engagement, spammy content or formatting, and an IP or domain that is on a blocklist. Fix authentication first, since it is the single highest-leverage change and the…

Quick verdict by use case: For highest deliverability with the least configuration, Postmark is the consistent recommendation. For low-cost high volume on an AWS stack, Amazon SES at $0.10/1,000 emails is hard to beat. For developer experience and React/Next.js teams, Resend stands out. For a combined transactional + marketing + automation platform, Brevo covers both…

The right Mailchimp alternative depends on why you’re leaving and what you need next. For SaaS lifecycle and automation teams, Customer.io or Loops handle event-triggered onboarding and product-driven workflows that Mailchimp handles awkwardly. For creators and simple senders who want clean newsletters without contact-based price creep, MailerLite or Brevo are the most cost-effective replacements. For…

The right SendGrid alternative depends on what’s actually driving you to look elsewhere. If the issue is shared-IP deliverability, Postmark or Resend solve that with transactional-only infrastructure. If pricing at scale is the problem, Amazon SES undercuts everyone on raw cost but hands you all the operational complexity. If you need lifecycle automation alongside transactional…

Email automation sends messages based on user behavior and lifecycle stage rather than fixed broadcast schedules. For SaaS, the five workflows that matter are onboarding, trial conversion, retention, expansion, and re-engagement.

Send email in Node.js with Nodemailer: install, configure SMTP, call sendMail(), verify connections, add attachments, and scale with a provider HTTP API.

The fastest way to send email in Python is with the standard library: smtplib + EmailMessage. Here is a minimal working example that connects to an SMTP server and sends a plain-text message: That covers the hello-world case. For production use, most teams send through a transactional email service rather than raw SMTP. The sections…

DMARC (Domain-based Message Authentication, Reporting & Conformance) tells receiving mail servers what to do when a message claims to be from your domain but fails SPF or DKIM checks. Setting it up takes about 15 minutes: you publish one DNS TXT record, collect reports for a few weeks, and then tighten the policy. Start here:…

A transactional email is an automated, one-to-one message sent to a specific user in direct response to an action they took or a system event that concerns them: a password reset, an order receipt, an account verification code, a shipping update. Unlike a marketing campaign that goes to a list, a transactional email is triggered…

Cold email and lifecycle email marketing serve different jobs in a SaaS growth strategy — and most teams conflate them. Here is how to run both channels correctly, why deliverability is the deciding factor in cold outreach, and where Cold Letter fits in.

Cold email remains one of the highest-ROI outreach channels for SaaS teams — when built on the right infrastructure. Learn how to structure campaigns, authenticate your domain, and use Cold Letter to book meetings at scale.