What Port Does Gmail Use?
465. Gmail SMTP port (SSL): 465. Gmail SMTP TLS/SSL required: Yes. Does Gmail allow port 25? If you don’t require TLS encryption, you can configure your on-premise mail server to point to smtp-relay.gmail.com on port 25, port 465, or port 587. Note: Without TLS encryption, you can’t use SMTP authentication and must use IP address […]