Modify macOS 11 Mail

The purpose of this page is to describe how to change settings on an existing email account with OlympusNet email.

  1. Open the Mail application and click on the word Mail to the right of the Apple in the upper left corner of the screen. Then select Preferences.
    Mail Prefs

  2. Click on the Accounts icon.
  3. To add an additional email account, click on the + at the bottom of the Accounts panel. Then follow the link at the bottom of this document for the set up document. Skip to Step 7 in the new document and continue.
    Add Account

  4. To change a setting in an existing account, click the account in the Accounts list to highlight it, then click the Server Settings tab to the right as shown in the screenshot below; a POP account named Olympus is shown with correct settings below.
    1. The Host Name for accounts ( is
    2. The Host name for Domain email ( is
    3. The Incoming Port using POP: 995
    4. The Incoming Port using IMAP: 993
    5. The Outgoing Port for all: 587
      Modify Settings

  5. If any settings are changed, click the Save button when finished. The account will show a Verifying message. If there are typos, it will fail to Verify. Double-check all the spellings, retype the password and click Save again.
  6. After saving changes, click the word Mail up by the apple, and choose Quit Mail. Reopen Mail, and test by sending email to your own email address to make sure it both goes out, and comes back in.
  7. Advanced outgoing help: If there is a persistent problem sending email even if the Settings button looks right, look at the Account button immediately below Outgoing Mail Server (SMTP). Does the name match the account? (In the screenshot, the account is named, so it is using a server set up for janedoe, as desired. Click on the account button and choose Edit SMTP Server List from the drop down, and continue.
    SMTP Account

  8. The screenshot below shows the new dialogue window that opens.Check to make sure there aren’t two different servers handling the email address. One outgoing server per line shows in the rectangle at the top. Check the details of the settings in the bottom half of the screen for errors. If one of two same-looking servers has an error, highlight that server name in the rectangle and click the minus button below the rectangle. Click OK after any changes. Check the Account field again, and make sure it has an entry. Quit Mail, reopen, and test again. [Caution: do NOT click the minus button on the top page where the accounts are listed - this deletes the account and all of the email in the account, unrecoverably.]
    SMTP Settings

Additional Options

  1. On the Account Information tab the Description field can be changed to a name that best describes the account as desired.
    In a POP account, typically it is most convenient to check mark the box Remove copy from server after retrieving a message. Email in a POP account downloads and archives on the computer, and the email on the server is dropped according to the time span selection made: immediately, after one week or after one month. Email on the server is dropped according to the selected time span so that email does not accumulate on the server.
    Account Information

  2. The Mailbox Behaviors tab: The options here regard handling Junk and Deleted email. Click drop-down menus for time options. An account set up in IMAP (not shown) has additional options for storing specific emails in folders on the server, or folders on-my-mac, including Sent, Drafts, Trash.
    Mailbox Behaviors

To set up macOS 11 Mail see Setup macOS 11 Mail.