CC Proxy can work as mail proxy server for Dreamweaver.

CCProxy is an easy-to-use proxy server software. Full supports Windows 98/ME/NT/2000/XP. For more details of CCProxy, please click here. Also you can download it here for a trial. CC Proxy Server allows all computers on the LAN access the Internet through a single Internet connection. You only need to install CC Proxy on the server which can access the Internet directly and other PC clients can connect to the Internet through CC Proxy. It will provide you a cost-effective Internet connection sharing solution without losing ease of use and peace of mind.

Suppose email address is .
Mailbox account: support
Password:***********
SMTP address: smtp.youngzsoft.com
POP3 address: pop3.youngzsoft.com
Proxy server address: 192.168.0.1

Launch Eudora.
Menu"Tools"--> "Opitions"

Real name: input your own name.
Mail Server (Incoming): input proxy server ip address.
Login Name: support#pop3.youngzsoft.com##support#smtp.youngzsoft.com
SMTP Server (Outgoing): input proxy server ip address.

Note:
If your original SMTP server requries authentication,
Login Name = Your original name#Your original POP3 server address##Your original login name#Your original SMTP server address
else
Login Name = Your original name#Your original POP3 server address###Your original SMTP server address

Only the version after 01/06/2002 of CCProxy supports Eudora mail proxy. You can download this version here.