Joomla

Joomla supports sending email over SMTP. To have Joomla relay email through SendGrid go to Site > Global Configuration and change:

• Mailer - SMTP
• SMTP Host - smtp.sendgrid.net
• SMTP Port - 587
• SMTP Security - STARTTLS
• SMTP Authentication - Yes
• SMTP User - "apikey"
  SMTP User must be the exact string, "apikey"
• SMTP Pass - <Your API Key>
  SMTP Pass is your actual API key