What is POP3 and which are the default POP3 ports. Post Office Protocol version 3 (POP3) is a standard mail protocol used to receive emails from a remote server to a local email client. POP3 allows you to download email messages on your local computer and read them even when you are offline.
Reduce heat; simmer 10 minutes. Return to a boil. Add shrimp. Cook until bright pink and opaque, about 1 minute 45 seconds. Use a slotted spoon to transfer shrimp to a wire rack set over a rimmed baking sheet; cover with ice, and let cool, about 5 minutes. (To store, fill a bowl 3/4 full with ice. Put shrimp in resealable plastic bags. Place atop ice; cover with more ice. Refrigerate up to 1 day, replenishing ice as needed.). To serve, arrange shrimp along rim of an ice-filled bowl (or on a platter) accompanied by lemon slices and cocktail sauce or lemon aioli.
Don't worry about the water boiling or time, it does not matter! When you see 1 or 2 shrimp float! drain immediately and have an ice bath waiting, to shock the shrimp and stop cooking process. Drain well and chill 1 hour before serving! If eating hot serve right after cooking. If you follow this method you will only serve the best.