Note: If you are receiving a “Cannot send message using the server mail.optimum.net” error when sending mail, please click here for instructions on how to resolve the issue.
To set up email on Mac OS X Mail:
- Open Apple Mail.
- Click Mail then Preferences.
- Go to the Accounts tab and click the plus (+) button underneath the Accounts field to add a new account.
- Select POP3 in Account Type.
- Enter your Optimum Online e-mail address in the Email Address field.
- In the Full Name field, type your name how you'd like it to appear when people get e-mail from you (for example: John Smith).
- Enter your e-mail server name (see below for instructions) in the Incoming Mail Server field.
- Enter your Optimum ID in the User Name field. (Your Optimum ID is the part of your e-mail address to the left of the "@" sign, for example: jsmith.)
- Enter your password in the Password field.
- Enter your e-mail server name (see below for instructions) in the Outgoing Mail Server (SMTP) field.
- Click OK
Issues Sending Mail in Mac OS X Yosemite
There are some known issues with sending mail in Mac OS X Yosemite and Mail version 8.0.
First, make sure you are running the latest version of the Mail Client. Go to “Mail -> About” from the Mail app to find your version. To upgrade, select Software Update from the Apple menu.
If you are still receiving the "Cannot send message…" error, follow these steps:
- On the error dialog, click Edit SMTP Server list.
- On the next screen, uncheck the box next to Automatically detect and maintain account settings.
- Check the box next to Allow insecure authentication.
- Click OK.
What is my e-mail server name?
POP3 (Incoming)Server: mail.optimum.net
Port: 110
SMTP (Outgoing)Server: mail.optimum.net
Port: 587