Enable SMTP Authentication for Eudora 5 & 6 for Windows

Enabling SMTP authentication

1. Open Eudora version 5 or version 6.
2. From the Tools menu select Options. The Options box appears.
3. In the Category box on the left select the icon Sending Mail.
4. In the box marked SMTP server enter mail.his.com
5. Verify that the check-box Allow authentication is checked.
6. Click OK.  SMTP authentication has now been enabled.

Note: An increasing number of cable and DSL providers (Comcast, Cox, Roadrunner, Verizon, etc...) are blocking the default SMTP port 25 except for their own mail servers. This is being done to help reduce the amount of spam sent from infected customer PCs.
Symptoms: you get an error sending mail, saying "could not connect to mail.his.com".
Solution:In order to send email through your HIS mail server from your cable/DSL account you will need to use SMTP port 587 for mail.his.com.

It's tricky to do that in Eudora for Windows, as Eudora has chosen to hide the Port change option, but here is how you can do it in version 6 and above:

1. Navigate to your Eudora install directory.
2. Look in the Eudora directory for the directory "extrastuff".
3. In this directory is a file named "esteric.epi". Drag (copy or move) this file into the main Eudora directory.

1. Launch Eudora.
2. Drop don the Tools menu, and choose Options.
   There will now be options extra listed, including a Ports Page.
3. Click on Ports, change from 25 to 587.