Sumday mail

I think you meant to type "Sunday mail"!

Sunday mail refers to the mail or postal service that is delivered on Sundays, which is typically a day when many businesses and government offices are closed. In some countries, Sunday mail is a regular service, while in others it may be limited or only available for certain types of mail, such as packages or priority mail.

In the United States, for example, the United States Postal Service (USPS) typically does not deliver mail on Sundays, except for certain types of mail, such as packages and priority mail. However, some private courier services, such as UPS and FedEx, may offer Sunday delivery for an additional fee.

In other countries, Sunday mail may be more common, especially in areas with high population densities or where Sunday is a regular working day.