How do I troubleshoot email delays or slow sending/receiving?

Check your Internet connection status by running an Internet bandwidth test to make sure you’re getting the speeds you pay for.
Confirm all email settings (including account information, SMTP settings, and ports) are correct.
Make sure your firewall, antivirus, and anti-spam solutions are configured correctly and are up-to-date.
Enable logging on your email software to track the SMTP conversation.
Test sending and receiving emails with other email services.
Contact your ISP or network administrator for additional support.