MODX supports sending email over SMTP. To have MODX relay email through SendGrid go to System Settings > ‘Mail’ area and change:

  • SMTP Authentication - Yes
  • SMTP Hosts - smtp.sendgrid.net
  • SMTP Password - sendgrid_password
  • SMTP Port - 587
  • SMTP Connection Prefix - tls
  • SMTP User - sendgrid_username
  • Use SMTP - Yes

The following image shows these settings.

MODX SMTP with SendGrid