How to Send Referral Invitation Emails with Ruby
Learn how to send referral invitation emails from your Ruby application using AISend's AI-powered email API. This guide covers setup, implementation, and best practices for inviting users to refer friends.
What are referral invitation emails?
Referral Invitation emails are transactional emails triggered by user actions, specifically for inviting users to refer friends. These emails are critical to your application's user experience — if a referral invitation email doesn't arrive, users lose trust in your product. Referral Invitation emails typically have high open rates (60-80%) because recipients are expecting them. This makes deliverability especially important — you need an email API that ensures these messages reach the inbox, not the spam folder. AISend's AI-powered routing selects the best email provider for each recipient, maximizing inbox placement for your referral invitation emails.
Setting up AISend with Ruby
Start by creating a free AISend account at aisend.app — no credit card required. From your dashboard, create an API key. Use the AISend REST API with Ruby's Net::HTTP or install a community gem. The API accepts standard JSON payloads. For production use, store your API key in environment variables — never hard-code credentials in your source code.
Sending referral invitation emails
To send a referral invitation email, make a POST request to the AISend API with four fields: from (your verified sending domain), to (the recipient's email), subject (a clear, descriptive subject line for your referral invitation email), and html (the email body). For referral invitation emails specifically, keep the content focused and actionable — include only the information the user needs for inviting users to refer friends. Avoid promotional content in transactional emails as it can hurt deliverability and may violate anti-spam regulations. AISend's AI automatically scores your content for deliverability before sending.
Best practices for referral invitation emails in Ruby
Send referral invitation emails immediately when triggered — delays frustrate users, especially for time-sensitive emails like referral invitation. Use a background job queue to avoid blocking your application's response time. Include clear branding so users recognize your email. Keep subject lines descriptive and specific (e.g., "Your referral invitation from [AppName]"). Set up webhook handlers to track delivery status and handle bounces. Always include both HTML and plain text versions for accessibility. Use AISend's domain verification to set up SPF, DKIM, and DMARC for maximum deliverability.
Why use AISend for referral invitation emails?
AISend is built specifically for transactional emails like referral invitation notifications. AI-powered multi-provider routing ensures your emails reach the inbox by selecting the best provider (AWS SES, Postmark, or SMTP) for each recipient. Content scoring catches deliverability issues before they affect your sender reputation. And the API is designed to be developer-friendly — send your first email in under 5 minutes with the free tier (1,000 emails/month, no credit card required).
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