Setting up Mail OS X - Yosemite

Step 1 - Open Mail
Step 2 - Mail settings
Step 3 - Account
Step 4 - Account type
Step 5 - Account information
Step 6 - Manual configuration
Step 7 - Incoming server
Step 8 - Outgoing server
Step 9 - Mail settings
Step 10 - Preferences
Step 11 - Accounts
Step 12 - Advanced
Step 13 - IMAP path and incoming port
Step 14 - Save changes

Step 1 - Open Mail

Open Applications and click on Mail.


Step 2 - Mail settings

From the top bar click Mail.


yosemite mail settings

Step 3 - Account

Click Add account.


yosemite add account

Step 4 - Account type

  • Select Add Other Mail Account.
  • Click Continue.

yosemite add other

Step 5 - Account information

Enter the following details:

  • Full Name, in this example Firstname Lastname.
  • Email Address, in this example mail@one-example.com.
  • Password it is the password that you created for the email account.

Click Create.

yosemite get started

Step 6 - Manual configuration

Click Next.


yosemite next

Step 7 - Incoming server

Select IMAP, if not already highlighted.

For Incoming Mail Server info use the following settings:

  • Mail Server: imap.one.com
  • User Name: Enter your email address, in this example mail@one-example.com.
  • Password: Enter your password, that you created for that email account.

Click Next.

yosemite imap settings

Step 8 - Outgoing server

For Outgoing Mail Server info use the following settings:

  • SMTP Server: send.one.com
  • User Name: Enter your email address, in this example mail@one-example.com.
  • Password: Enter your password, that you created for that mail address.

Click Create.

yosemite smtp settings

Step 9 - Mail settings

From the top bar click Mail.


yosemite mail again

Step 10 - Preferences

Click Preferences.


yosemite properties

Step 11 - Accounts

Click Accounts.


yosemite accounts

Step 12 - Advanced

Click Advanced.

Optional: In the dropdown next to Outgoing mail Server (SMTP) click Edit SMTP server list and check that the SMTP server is using port 465 or 587 with SSL.
yosemite advanced

Step 13 - IMAP path and incoming port

  • For IMAP Path Prefix enter INBOX.
  • Change the Port (incoming) to 993.
  • Exit the window by clicking the red dot in the upper left corner.

yosemite port incoming

Step 14 - Save changes

Click Save.


yosemite save changes

Congratulations, you have successfully set up your One.com mail account on your Mac.