It’s interesting, and perhaps a little embarrassing, to compare communications styles over the ages.
Paul the Apostle begin his letter to the Church in Thessalonica with, “Paul, Silvanus and Timothy, to the Church in Thessalonica which is in God the Father and the Lord Jesus Christ. Grace to you and peace. We always thank God for you all, mentioning you in our prayers continually.”
It was common in Colonial times to begin a letter with a variation of, “I hope this letter finds you and your family well,” and even George Washington closed his letters with “Your obedient servant, G. Washington.” It was such a common complementary close that it was often abbreviated as “Your obdt. svt.,”
When I was learning to write, we began each letter with, “Dear” even if we had never even met the person, and usually closed the letter with “Sincerely.”
Today, few write letters; as a matter of fact writing anything of length or consequence, being content to text, tweet or snap a selfie.
Wishing you a fine Sunday with family or friends, I remain yours truly,