macOS Mail Manual Configuration

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. Clik "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: TopScret
     Host Name: 192.168.1.100
          Port: 110
    Use TLS/SSL: Yes
Authentication: Password

Outgoing Mail Server (SMTP)
     User Name:
      Password:
     Host Name: 192.168.1.100
          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 Linux Systems

 Cockpit - Web Portal for Administrator

 Process Management

 Files and Directories

 Users and Groups

 File Systems

 Installing CentOS

 SELinux - Security-Enhanced Linux

 Network Connection on CentOS

 Software Package Manager on CentOS - DNF and YUM

 Running Apache Web Server (httpd) on Linux Systems

 Running PHP Scripts on Linux Systems

 Running MySQL Database Server on Linux Systems

 Running Python Scripts on Linux Systems

 vsftpd - Very Secure FTP Daemon

 Postfix - Mail Transport Agent (MTA)

 Dovecot - IMAP and POP3 Server

Email Client Tools - Mail User Agents (MUA)

 "mailx" Command - Send and Read Emails

 "Alpine" - Terminal-Based Email Client

 SquirrelMail Webmail Installation on CentOS

 SquirrelMail Configuration on CentOS

 Thunderbird Installation on macOS

 Thunderbird Configuration for POP3S and SMTP

 Thunderbird to Accept POP3S Certificate Exception

 Thunderbird Configuratin for SMTPS Service

 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

 GCC - C/C++ Compiler

 Conda - Environment and Package Manager

 Tools and Utilities

 References

 Full Version in PDF/EPUB