Difference between to send and to deliver in Korean
보내다·전하다

보내다to send
보내다 means to send something to another person or place. You can use it for letters, messages, photos, emails, and packages. It is a common everyday word for sending things by phone, online, or by mail.

전하다to deliver
전하다 (to deliver) means to take something and give it to another person, or to pass along words, news, or feelings. You can use it for letters, messages, greetings, and small things. It is a common word for everyday situations when you help one person receive something from another person.
The difference
전하다 is often used for news, greetings, feelings, or words rather than mailing a physical thing. It means passing something along to another person.