How do I check email headers to diagnose delivery issues?
Email headers contain routing information — sender IP, servers passed through, timestamps, SPF/DKIM results. In Gmail, open email > More (three dots) > Show original. Look for SPF: PASS, DKIM: PASS, and trace each Received: header. Tool: MXToolbox Header Analyzer. Contact Connect Quest support at connectquest.co.in with headers for diagnosis.