To send email through SendGrid using Magento we recommend the ASchroder.com SMTP Pro Email free extension. Once installed you need to change at least the following options:

  • Authentication - Login
  • Username - SendGrid Username
  • Password - SendGrid Password
  • Host - smtp.sendgrid.net
  • Port - 587
  • SSL Security -SSL TLS

The following image shows these settings.

Magento SMTP with SendGrid