macOS Mail Manual Configuration

This section provides a tutorial example on how to view and change macOS Mail connection settings manually, with different port number, SSL/TLS and authentication options.

What happens if macOS Mail auto configuration is not working? Don't worry. It allows you to review and change its connection settings.

1. Launch Mail app from the launchpad.

2. Click "Mail > Preference" menu. You see the "Accounts" dialog box.

3. Select the account you just created, and click the "Server Settings" tab.

4. Uncheck "Automatically manage connection settings" in both incoming and outgoing sections. You see the automatically detected settings:

Incoming Mail Server (POP)
     User Name: herong
      Password: TopSecret
     Host Name:
          Port: 110
    Use TLS/SSL: Yes
Authentication: Password

Outgoing Mail Server (SMTP)
     User Name:
     Host Name:
          Port: 587
   Use TLS/SSL: Yes
Authentication: None

So macOS is smart to detect the POP3 with TLS/SSL service on port 110, and the SMTP with TLS/SSL (also called Submission) service on port 587.

macOS Mail Connection Setting Details
macOS Mail Connection Setting Details

If this is not working, you can change port numbers, TLS/SSL and authentication options any way you want.

Table of Contents

 About This Book

 Introduction to Email

 Postfix - Mail Transport Agent (MTA)

 SSL/TLS Secure Connections with Postfix Server

 Dovecot - IMAP and POP3 Server

 SSL/TLS Secure Connections with Dovecot Server

Email Client Tools - Mail User Agents (MUA)

 "mailx" Command - Send and Read Emails

 "Alpine" - Terminal-Based Email Client

 macOS Mail Auto Configuration

macOS Mail Manual Configuration

 Accept Certificate Exception in macOS Mail

 Windows 10 Mail Configuration Failed

 SSL/TLS Connection Issue in Windows 10 Mail

 Mozilla Thunderbird - Mail User Agents (MUA)

 PHPMailer - PHP Package for Sending Emails

 Email Message Format and Headers


 Full Version in PDF/EPUB