由

you

cause, reason,

by, from, due to, because of

a plant (ι) sprouts from a field showing its origin

扌

shou

抽

chou

draw out; to pump

抽烟 – "to smoke a cigarette";  抽签 – "to draw lots";  抽税 – "to levy a tax"

a hand (扌) takes a bucket from (由) a well to draw out some water

邑

yi

city

a walled settlement with an official seal makes a city

邮

you

mail, post(al)

邮件 – "mail" (letters, packages); 邮局  – "post office"; 电子邮件 – "email"

FROM a field to a city a message is transported by mail