In Mac mail, select Mail -> Preferences
On the Accounts windows click on the + in the lower left corner
Full Name: your full name
Email Address: your CSULB email address
Password: your CSULB Internet Account password
Account Type : IMAP
Description: CSULB
Incoming Mail Server: imap.csulb.edu
User Name: your CSULB Internet Account username (the email address without the "@csulb.edu")
Password: your CSULB Internet Account password
Description: CSULB
Outgoing Mail Server (SMTP): enter smtp.csulb.edu
Use only this server : check this option
Use Authentication: check this option
Username and Password: verify these two fields; they are the same as for the incoming server.
Use Secure Sockets Layer (SSL) : uncheck this option
Authentication: select password
Account summary: You should see a screen very similar to this; please verify the information listed.
Accounts: You will be redirected to the Accounts screen. Under the section Outgoing Mail server (SMTP) click the drop down arrow next to the server name and select Edit Server List...
Under the Advanced tab, select Use custom port: and enter "587". Verify that Use Secure Sockets Layer (SSL) is unchecked and that your username and password are correct. When finished, click OK. You should automatically be returned to the Accounts window.
At the Accounts screen, go to the Advanced tab. Next to Port: enter "143". Make sure that the box Use SSL is unchecked. Close the Accounts window and save all changes when prompted.