Although we don't directly support other email clients, you can use any standards-based email client with your Connect/Google Apps account.
If you are sending/receiving through Google's SMTP or IMAP using a Google account, an App Password is required when using 2-Step Verification.
How to "Send Mail As" from Another Account
| Incoming mail server type: | IMAP |
| Incoming mail server name: | imap.gmail.com |
| Incoming mail server port: | 993 |
| Use secure connection: | SSL (TLS/STARTTLS if available) |
| Outgoing mail server name: | smtp.gmail.com |
| Outgoing mail server port: |
Port for SSL: 465 Port for TLS/STARTTLS: 587 |
| Use secure connection: | SSL |
| Outgoing mail server requires authentication: | Yes |
| Directory server: (only available on-campus) | ldap.ucsb.edu |
| Search base / base dn: | ou=people,o=ucsb |
| Authentication: | simple |
| User name: | uid=x,ou=people,o=ucsb |
| Password: | [password] |