Paul's letter to the Church in Ephesus begins as any letter would in Paul's day, with a salutation noting who the letter is from, to whom, and a greeting:
Paul, an apostle of Christ Jesus by the will of God,
To the saints who are in Ephesus and are faithful in Christ Jesus:
Grace to you and peace from God our Father and the Lord Jesus Christ.
Many early manuscripts leave out the allusion to Ephesus entirely, and because the letter addresses no particular congregational problems, it is best to read it as a circular letter, one addressed to the Church at large.
Paul, sent by Jesus by the will of God, is writing in this letter to us, dear people. Across the ages, his words are for us, "saints who are faithful in Jesus Christ." This is a letter not just for the Ephesians, but for us to. It is sent to Ephesians and Friends.
As we read them over these next few weeks, may we read them for us as they are intended, and by reading them may we be "gathered up into Christ" (Ephesians 1.10).