Change Server Settings in Mail on Mac

Use Server Settings preferences in Mail to change options for an account’s incoming and outgoing (SMTP) mail servers.

To change these preferences in the Mail app on your Mac, choose Mail > Preferences, click Accounts, then click Server Settings.

Note: The settings you see vary depending on your account type.

Incoming mail server settings

Username	Your username on the mail server.
Password	Your password on the mail server.
Host Name	The name of the mail server.
Automatically manage connection settings	Mail automatically manages settings for your email account in Mail, such as port numbers and authentication methods. If you unselect this option, you can specify the following, as directed by your email account provider: Port (or Internal Port and External Port), Use TLS/SSL: The port numbers for receiving messages, and whether to use TLS/SSL. Authentication: The authentication method. This option is available only for POP and IMAP accounts.
Advanced IMAP or Exchange Settings	Enter or change these settings as directed by your email account provider: IMAP Path Prefix: The location of your mailboxes on an IMAP server. TLS Certificate: Some mail servers require computers that connect to them to provide a certificate proving their identity. Allow insecure authentication: For email accounts that don’t support secure authentication, let Mail use a non-encrypted version of your username and password to connect to the mail server.

Account	The account of the mail server. To change outgoing server settings, as directed by your email account provider, click the Account pop-up menu, then choose Edit SMTP Server List.
Username	Your username on the mail server.
Password	Your password on the mail server.
Host Name	The name of the mail server.
Automatically manage connection settings	Mail automatically manages settings for your email account in Mail, such as port numbers and authentication methods. If you unselect this option, you can specify the following, as directed by your email account provider: Port (or Internal Port and External Port), Use TLS/SSL: The port numbers for sending messages, and whether to use TLS/SSL. Authentication: The authentication method. This option is available only for POP and IMAP accounts.

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