Your questions is ambiguous and grammatically incorrect.
Postal delivery varies from country to country, state to state. Also there are many ways to mail a letter for instance there is airmail which is faster then there is standard mail it's slower or there's priority mail, international for other countries and they all have a different time frame.
72
About 2-3 days with priority mail
First class mail is delivered in 3 to 5 days
First Class Mail is delivered in three to five days.
12,548,898,514 peices of mail
1-2 first class.
6... no mail on Sundays
First Class Mail is delivered in three to five days.
First Class Mail is delivered in three to five days.
The Postman has 294 pages.
He was known to deliver mail across the country to many people.