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Account Features and Settings

  • ★ API Docs
  • Subaccounts
  • Click Tracking
  • Subscription Plan Differences Explained
  • Verifying Login Devices
  • Team Setup
  • Customizing Bounce Notifications
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Email Delivery

  • ★ API Docs
  • ★ Sender Domains
  • 550 “Administrative Prohibition” or "Relay Access Denied"
  • "Domain of sender address does not exist" error
  • Barracuda Delivery Solution
  • Error: 550 that SMTP username's account is not allowed to send
  • Enabling or Disabling Delivery Status Notifications (DSN) in Outlook
  • See all 19 articles

Technical Details

  • ★ API Docs
  • ★ Detailed Setup Guides
  • VERP - Variable Envelope Return Path
  • How to Find Full Email Headers
  • Sub-Processor List
  • EU Specific Services
  • Worldwide Server Locations, IP Addresses, and Email Routing
  • See all 22 articles

Billing

  • ★ API Docs
  • Email Overage
  • Upgrading Your Plan
  • Reopening a Closed Account
  • Updating Your Payment Details
  • Updating Billing Details
  • Free Plan
  • See all 10 articles

API and Integrations

  • ★ API Docs
  • SMTP2GO WordPress Plugin
  • Setting Up Webhooks

DNS Setup

  • ★ API Docs
  • DNS Setup for Weebly
  • DNS Setup for Squarespace
  • DNS Setup for 1&1 IONOS
  • DNS Setup for Wix
  • DNS Setup for Namesco
  • DNS Setup for Network Solutions
  • See all 28 articles
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