This task can be performed using Lemón Simple Email Service
Convert free user into paid with AI-friendly email API
Best product for this task

Lemón Simple Email Service
marketing
From "meh" emails to "omg, they get me!". Easy and simple RestAPI to trigger email dynamically with your AI-generated content at run time. If you're doing something with AI/ML/LLM for your SaaS, then Lemón Email is perfect for you. But if you are simply looking for a generic email API/SMTP, you should use Sendgrid, Mailgun, or Amazon SES.

What to expect from an ideal product
- Connects to any AI model output and inserts personalized content into emails right before sending
- Uses a simple REST API to merge AI-generated text with email templates on the fly
- Handles dynamic content insertion without needing to pre-create multiple email variations
- Takes AI content from your system and places it in the right spots in your emails automatically
- Sends personalized emails immediately after your AI generates unique content for each recipient