What is a Messenger?

Word Study on "Messenger"
Link to bible study https://docs.google.com/document/d/1sxPJ5B5bFUJSwHAzwGjJvrmzn9W82jJarK5JlOh_PHk/edit?usp=sharing

In the definition of messenger we learn it can also mean teacher, priest, prophet, apostle, and pastor.
We learn about a wicked messenger in Prov 13.17 with cross references to many verses talking about prophets and or people who trade, gain and profit from the word of God. We all need to discriminate truth from lie even those who watch my videos need to discriminate what is shared here.

Jeremiah 23:28 (KJV) False Prophets and Empty Oracles
28 The prophet that hath a dream, let him tell a dream; and he that hath my word, let him speak my word faithfully. What is the chaff to the wheat? saith the LORD.

Robert Jamieson, A. R. Fausset, and David Brown, Commentary Critical and Explanatory on the Whole Bible.
28. God answers the objection which might be stated, “What, then, must we do, when lies are spoken as truths, and prophets oppose prophets?” Do the same as when wheat is mixed with chaff: do not reject the wheat because of the chaff mixed with it, but discriminate between the false and the true revelations. The test is adherence to, or forgetfulness of, Me and My law (Je 23:27).
that hath a dream—that pretends to have a divine communication by dream, let him tell it “faithfully,” that it may be compared with “my word” (2 Co 4:2). The result will be the former (both the prophets and their fictions) will soon be seen to be chaff; the latter (the true prophets and the word of God in their mouth) wheat (Ps 1:4; Ho 13:3).  

2 Corinthians 2:17 (KJV)
17 For we are not as many, which corrupt the word of God: but as of sincerity, but as of God, in the sight of God speak we in Christ.

Corrupt g2585. καπηλεύω kapēlĕuō, kap-ale-yoo´-o; from κάπηλος kapēlŏs (a huckster); to retail, i.e. (by impl.) to adulterate (fig.):—corrupt.
BDAG - trade in, peddle, huckster  also fig. 2 Cor 2:17
Louw-Nida - 57.202 καπηλεύω: to engage in retail business, with the implication of deceptiveness and greedy motives—‘to peddle for profit, to huckster.’ οὐ γάρ ἐσμεν ὡς οἱ πολλοὶ καπηλεύντες τὸν λόγον τοῦ θεοῦ ‘we are not like so many others who peddle God’s message’ 2 Cor 2:17.
DBL - peddle for profit (2Co 2:17+)
Thayer - καπηλεύω; (κάπηλος, i.e. a. an inn-keeper, esp. a vintner; b. a petty retailer, a huckster, pedler. b. with acc. of the thing, to make money by selling anything; to get sordid gain by dealing in anything, to do a thing for base gain. Hence some suppose that καπηλεύειν τ. λόγον τοῦ θεοῦ in 2 Co. 2:17 is equiv. to to trade in the word of God, i.e. to try to get base gain by teaching divine truth. But as pedlers were in the habit of adulterating their commodities for the sake of gain, was also used as synonymous with to corrupt, to adulterate and most interp. rightly decide in favor of this meaning (on account of the context) in 2 Co. 2:17