If you encounter an SMTP connection error, it’s likely due to your email service provider rejecting one of your email addresses. Ensure your “from,” “reply-to,” and “bounce” addresses match the authenticated SMTP email. Check DNS functionality and connectivity using commands like `dig` and `telnet`. If issues persist, contact your ISP for support.
When sending campaigns, subscribers may be marked as errors due to invalid email addresses, non-existent domains, or server rejections. While these errors are often subscriber-based, Mailster may misclassify some as campaign-based. Common server rejections include reaching sending limits or blacklisted emails. For specifics, consult your email provider.
Mailster may display a “parsererror 200” when an Ajax request fails to return valid JSON, often due to third-party plugins or unexpected server outputs. To diagnose the issue, check the developer console for detailed error information.
The Browser Console is essential for tracking JavaScript errors and server-related information. Access it in Chrome (CTRL + SHIFT + J), Safari (CTRL + ALT + I), IE9 (F12), Firefox (CTRL + SHIFT + K), or Opera (CTRL + SHIFT + I) to troubleshoot effectively.