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1. What Are SMTP Credentials?

SMTP credentials consist of:
✅ SMTP Server host name – The mail server responsible for sending emails. ( eg. relayxx.mysmtp.com)
✅ SMTP Port – The network port used for email transmission (e.g., 587, 25).
✅ SMTP Username – Usually the email address or an assigned username for authentication.
✅ SMTP Password – The password associated with the SMTP username, ensuring secure access. These details are used by email clients, applications, or automated systems to send emails reliably.

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2. How to Generate SMTP Credentials

Generating SMTP credentials depends on your email provider or SMTP relay service. Below are common steps for setting up SMTP credentials:

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🔹 For Custom Domains (e.g., Your Own Mail Server)

1️⃣ Access Your Email Hosting Provider’s Dashboard
  • Log into cPanel, Plesk, or any email control panel provided by your hosting service.
2️⃣ Find the SMTP Settings Section
  • Look for “Mail Settings”, “SMTP Configuration”, or similar options.
3️⃣ Create a New Email Account or SMTP User
  • If required, generate a new SMTP username and password.
4️⃣ Note Down the SMTP Server and Port Information

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🔹 For Third-Party SMTP Providers (e.g., mySMTP)

1️⃣ Sign Up for an SMTP Relay Service
  • Go to your chosen provider’s website and create an account.
2️⃣ Generate API Keys or SMTP Login Credentials
  • Navigate to SMTP settings and create new credentials.
3️⃣ Verify Your Domain and Authentication Records
  • Add SPF, DKIM, and DMARC records to your DNS settings for improved deliverability.
  • Use test.smtp.ai to verify setup.

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3. Testing Your SMTP Credentials

Before sending emails, test your SMTP setup to avoid errors. 🔹 Use test.smtp.ai to check:
✅ Authentication (SPF, DKIM, DMARC)
✅ SMTP connectivity and response time
✅ Blacklist status

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4. Troubleshooting Common SMTP Issues

🚨 Incorrect Username/Password: Double-check credentials and reset if necessary.
🚨 Port Blocked by ISP: Try switching to 587 (TLS)
🚨 Authentication Failed: Ensure SMTP authentication is enabled in email settings.
🚨 Emails Going to Spam: Set up SPF, DKIM, and DMARC records correctly.