Sendwithus relies on your Email Service Provider for analytics. Make sure you check the chart below to ensure yours is fully supported:

ESP Open Click Bounce Unsubscribes Attachments
SparkPost ✓ ✓ ✓ ✓* ✓
Mailjet ✓ ✓ ✓ ✓ ✓
Mailgun ✓ ✓ ✓ ✓ ✓
Mandrill ✓ ✓ ✓ ✓ ✓
SendGrid ✓ ✓ ✓ ✓ ✓
Postmark ✓ ✓ ✓ ✗ ✓
Amazon SES ✗ ✗ ✗ ✗ ✓
SMTP Server ✗ ✗ ✗ ✗ ✓

*API Only