| Mail Client | Version | Authentication | Configuration Instructions |
| The Bat | 1.39 | LOGIN, CRAM-MD5 | Click For Instructions |
| Eudora | 4.x | CRAM-MD5 | Click For Instructions |
| Eudora | 3.x, Lite | Not Supported | Upgrade Required |
| Netscape | 3.x | Not Supported | Upgrade Required |
| Netscape | 4.0x | LOGIN | Click For Instructions |
| Netscape | 4.x | LOGIN, PLAIN | Click For Instructions |
| Outlook Express | 4.x, 5.x | LOGIN | Click For Instructions |
| PegasusMail | 3.1 | CRAM-MD5 | Click For Instructions |
| Outlook | 97 | May Be Supported | Microsoft Support |
| Outlook | 98/2000 | LOGIN, PLAIN | Configure Like Outlook Express |
| Becky | 2.0 or later | PLAIN,LOGIN,CRAM-MD5 | [Tools] - [Mailbox Setup] - [Misc.] - Check "SMTP Auth" |
| nPOP | 0.4.8 or later | LOGIN, CRAM-MD5 | [Accounts] - [Config] - [Submission] - Check "Authorization Using SMTP-AUTH" |
| PMMail | 2000 | Supported | Click For Instructions |