For an example of the Bible's explination of who the " Lord Almighty/Jehovah" is compared to the Lord/Jesus, here ya go......
The messenger here is Jesus or God's spokesman the "word'.
Good News Translation (GNT)
3 The Lord Almighty answers, “I will send my messenger to prepare the way for me. Then the Lord you are looking for will suddenly come to his Temple. The messenger you long to see will come and proclaim my covenant.”
2 But who will be able to endure the day when he comes? Who will be able to survive when he appears? He will be like strong soap, like a fire that refines metal. 3 He will come to judge like one who refines and purifies silver. As a metalworker refines silver and gold, so the Lord's messenger will purify the priests, so that they will bring to the Lord the right kind of offerings. 4 Then the offerings which the people of Judah and Jerusalem bring to the Lord will be pleasing to him, as they used to be in the past.
5 The Lord Almighty says, “I will appear among you to judge, and I will testify at once against those who practice magic, against adulterers, against those who give false testimony, those who cheat employees out of their wages, and those who take advantage of widows, orphans, and foreigners—against all who do not respect me.
The Payment of Tithes
6 “I am the Lord, and I do not change. And so you, the descendants of Jacob, are not yet completely lost.
Cross references:Malachi 3:1 : Matt 11:10; Mark 1:2; Luke 1:76; Mal 7:27Malachi 3:2 : Joel 2:11; Rev 6:17Malachi 3:6 : Sir 48:10