Transactional Email APIs · monthly outage report
Transactional Email APIs outages: September 2025
The 14 transactional email APIs we track reported 22 incidents in September 2025. SMTP2GO reported the most (6). 7 had a clean month: Amazon SES, Brevo, Mailchimp Transactional (Mandrill), MailerSend, Mailtrap Email Sending, Resend, Twilio SendGrid.
| Vendor | Incidents | Partial / major |
|---|---|---|
| SMTP2GO | 6 | 1 |
| Mailgun | 5 | 2 |
| Postmark | 5 | 0 |
| Mailjet | 2 | 2 |
| SparkPost (Bird) | 2 | 0 |
| Elastic Email | 1 | 0 |
| Loops | 1 | 1 |
| Amazon SES | 0 | 0 |
| Brevo | 0 | 0 |
| Mailchimp Transactional (Mandrill) | 0 | 0 |
| MailerSend | 0 | 0 |
| Mailtrap Email Sending | 0 | 0 |
| Resend | 0 | 0 |
| Twilio SendGrid | 0 | 0 |