Yes, US mail should be capitalized as it is an abbreviation for United States mail.
Yes, "Mail Carrier" should be capitalized as it is a title given to a specific occupation.
No, the term "digital mail" should not be capitalized in a sentence unless it is at the beginning of a sentence or included in a title.
Yes, "Southeastern" in "Southeastern US" should be capitalized as it is part of a proper noun.
Yes, "Rural Route" should be capitalized as it is a proper noun referring to a specific type of address used in rural areas for mail delivery.
Yes, when referring to the title of the President of the United States, it should always be capitalized.
Daily Mail should only be capitalized when referring to the newspaper title. When talking about a daily mail delivery, for example, it shouldn't be capitalized.
Yes, "Mail Carrier" should be capitalized as it is a title given to a specific occupation.
No, the term "digital mail" should not be capitalized in a sentence unless it is at the beginning of a sentence or included in a title.
No, except at the beginning of a sentence because it is not a proper noun.
The word citizen does not need to be capitalized.
Yes, "Southeastern" in "Southeastern US" should be capitalized as it is part of a proper noun.
Yes. US Government is capitalized.
Yes, "Rural Route" should be capitalized as it is a proper noun referring to a specific type of address used in rural areas for mail delivery.
Yes, when referring to the title of the President of the United States, it should always be capitalized.
The services that the mail offers in the US are certified mail, registered mail, insured mail, express mail, and many more.
It depends on the context. If they preced the name of a continent they do.
Yes. It is a proper noun.