Resolve Gmail Send/Receive Issue

My Gmail account suddenly stopped sending and receiving messages. There are no error pop-ups—messages simply sit in the outbox and nothing new arrives in the inbox—so the usual clues aren’t there. I have already confirmed that my internet connection and browser settings are in good working order, which rules out the basic troubleshooting steps.

I need someone who knows the nuances of Gmail’s server settings, filters, forwarding rules, and potential account suspensions to locate the bottleneck and restore normal mail flow. Once the root cause is found, I’ll also need a concise hand-over explaining what went wrong and how to prevent a repeat.

Deliverable
• Gmail account fully able to send and receive messages, demonstrated with live test emails

If you’ve untangled similar Gmail issues before, I’m ready to get started right away.