Send email via API

Mailgun

Limits for Free plan (no credit card required): 

• 5,000 messages/month are included
• There is a limit of 300 messages per day on the included sandbox domain
• Data retention for Logs and the Events API is 1 day
• You cannot create custom domains
• You can only send to Authorized Recipients, and there is a maximum of 5 Authorized Recipients

Mailtrap

• 100 max emails per hour.

Sendgrid

• 100 emails per day