Version:           1.13.6 (using KDE 4.6.0) 
OS:                Linux

(Reason for major severity: security hole, credentials disclosed to wrong party)

When sending a message using an identity that uses a SMTP account other than the default, kmail connects to the default SMTP server instead, but tries to authenticate with username and password defined in the non-default SMTP account selected for the identity. This has two effects:

- email is not sent because SMTP authentication fails
- identity's SMTP account credentials are disclosed to the default SMTP server



Reproducible: Always

Steps to Reproduce:
1. Set up two SMTP accounts on different servers, let's call them a and b.
2. Set a as the default SMTP account.
3. Set up two identities, let's call them A and B.
4. Assign account a as sending account for identity A; assign account b as sending account for identity B.
5. Try sending mail using identity B.

Actual Results:  
Authentication failure and password disclosure because KMail uses credentials from account b but sends them to account a's SMTP server.

Expected Results:  
Account b's server should be used.

OS: Linux (i686) release 2.6.37-ARCH
Compiler: gcc