- - Contents IMM Revision: Availability of Electronic USPS Delivery Confirmation International Service Effective January 28, 2024, the Postal Service™ will revise Mailing Standards of the United States Pos..." /> - - Contents IMM Revision: Availability of Electronic USPS Delivery Confirmation International Service Effective January 28, 2024, the Postal Service™ will revise Mailing Standards of the United States Pos..." />