郵送

1. Origins, structure, and basic meaning

• Structure: 郵送 (ゆうそう) means sending documents or goods through the mail. 郵送した is completed; 郵送する states a service policy.
• Basic usage: Required documents are mailed to an office; guidebooks are mailed free to requesters.

2. Common pitfalls and similar expressions

• Documents sent to an office and mailing service for applicants
  • The sent item takes を; destination uses へ or recipient には. The word specifies postal delivery rather than personal hand delivery.