1貴函
Your letter; Your favour; your esteemed letter; Your esteemed favour; Your valued letter; Your valued favour; Your note; Your communication; Your greatly esteemed letter; Your very friendly note; Your friendly advice; Yours.
2本信，本函
Our (my) letter; Our (my) respects; Ours (mine); This letter; these lines; The present.
3前函
The last letter; The last mail; The last post; the last communication; The last respects（自己的信）; The last favour（來信）
4次函
The next letter; The next mail; The next communication; The letter following; the following.
5貴函發出日期
Your letter of (the) 5th May; Your favour dated (the) 5th June; Yours of the 3rd July; Yours under date (of) the 5th July; Your letter bearing date 5th July; Your favour of even date(AE); Your letter of yesterday; Your favour of yesterday's date; Your letter dated yesterday.
6貴方來電、電傳及傳真
Your telegram; Your wire; Your cablegram（從國外）; Your coded wire（密碼電報）; Your code message; Your cipher telegram; Your wireless telegram; Your TELEX; Your Fax.
7貴方電話
Your telephone message; Your phone message; Your telephonic communication; Your telephone call; Your ring.
8通知
Noun: Advice; Notice; Information; Notification; Communication; A report; News; Intelligence; Message.
Verb: （通知，告知）To communicate (a fact) to; To report (a fact) ; To apprise (a person) of; To let (a person) know; To acquaint (a person) with; To intimate (a fact) to; To send word; to send a message; To mail a notice; to write (a person) information; To give notice（預告）; To break a news to（通知壞消息）; To announce（宣佈）.
9回信
Noun: An answer; A reply; A response.
Verb: To answer; To reply; To give a reply; To give one's answer; To make an answer; To send an answer; To write in reply; To answer one's letter.
特此回信：Reply to; Answering to; In answer to; In reply to; In response to.
等候回信：To await an answer; To wait for an answer.
收到回信：To g