郵送 (ゆうそう)mailing; posting

mailing; postingnoun (common) (futsuumeishi), noun or participle which takes the aux. verb suru

郵送, its kanji, and other words that share them.Open this graph

Kanji in 郵送

郵便ゆうびんmail service; postal service
郵政省ゆうせいしょう(former) Ministry of Posts and Telecommunications (now Ministry of Internal Affairs and Communications)
郵政ゆうせいpostal system
郵便局ゆうびんきょくpost office
郵貯ゆうちょpostal (post-office) savings (deposit)
郵便切手ゆうびんきってpostage stamp
郵便受けゆうびんうけmailbox; letter box
郵便為替ゆうびんかわせpostal money order
放送ほうそうbroadcast; broadcasting
輸送ゆそうtransport; transportation
先送りさきおくりpostpone
送るおくるto send (a thing); to dispatch
見送りみおくりseeing one off; farewell
見送るみおくるto see someone off (at a station, an airport, etc.); to escort (e.g. home)
送りおくりseeing off; sending off
運送うんそうtransport; freight

See how 郵送 connects to the rest of Japanese.