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


Option | Description | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
User Name | Your user name 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 deselect this option, you can specify the following, as directed by your email account provider:
| ||||||||||
Advanced IMAP or Exchange Settings | Enter or change these settings as directed by your email account provider:
| ||||||||||
Option | Description | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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. | ||||||||||
User Name | Your user name 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 deselect this option, you can specify the following, as directed by your email account provider:
| ||||||||||
If you change settings, click Save to save your changes.
In this post, I would like to share how to install mail server on Mac OSX. Having mail server is important if you need to send email from your web application in local environment. To do this, we will use Postfix.
Postfix is a Mail Transport Agent (MTA), supporting LDAP, SMTP AUTH (SASL) and TLS. In this post, We will setup Postfix to run with SMTP.
No need it because Postfix already exist as pre-installed on Mac OSX. Open your terminal, make sure you can see response if you type below:
Great, then we are going to configure it to be able for sending email.

We are going to change postfix configuration file. Run this command below:
Make sure if these lines below are exist
Then, add these lines at the end of file
From codes above, you can see that we use Gmail SMTP for our postfix. Next step is add our gmail's username and password.
and add this line
Then run command below to create the hash db file for Postfix.
Configure the postfix daemon
Add these lines before </dict>

Start the postfix service
* Note that if you make changes in postfix configuration file (/etc/postfix/main.cf), you have to run command
Here is the command you need to execute to test postfix.
If success, you will receive email in your inbox.

If you want to see mail queues, execute this command
If you want to see mail log, execute this command
Setting up mail server on Mac OSX can be done using pre-installed Postfix. Having mail server in local environment will give you advantage for your web application that have sending email feature.