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Apple Mail

Supported Product

Apple's Mail is among several email clients in use on campus, and is not supported by all schools and units. Please refer to the document Email Specifications by School, or speak with your local support provider to find out which e-mail client is recommended for your use.

Mail is a graphical email client for macOS that accesses mail on remote servers via either the Internet Message Access Protocol (IMAP) or the Post Office Protocol (POP). To use Mail, you need an account on a mail server running IMAP or POP.



Important note: all versions of Apple automatically update to the latest available versions for their respective operating systems. Information Systems & Computing (ISC) strongly suggests allowing all of these update processes to complete.


  • Mail is included in the default install of macOS.

Related resources

  • Apple's Mail product page.

Follow the instructions below to configure Apple Mail for the Penn Online Directory (LDAP).

  1. Launch Apple Mail.
  2. From the Mail menu, select Preferences... .
  3. Click the Composing icon.
  4. Ensure the Automatically complete addresses checkbox is selected, then click Configure LDAP... .
  5. Mail may ask if it can use the item in your keychain. If so, click Always Allow.
  6. Ensure the Active checkbox is selected for the Penn Online Directory.
  7. Click Done.
  8. Quit Mail.