I have problems with KMail when I want to send a mail with a smtp server which handles SSL encryption, a notification pops up saying that the transport failed, and writing to socket failed.

I give a try with thunderbird and the same settings for the smtp server with SSL and it works well. So the problem is with KMail or any related component but I do not know where or what search to solve this issue.

The first time, I used the account wizard. The second time, I decided to configure the smtp server manually after having removed it. So I have gone to settings > Configure KMail > Accounts > sending tab > and I add the smtp server with this settings : encryption SSL on port 465 (like thunderbird was set), authentication plain, server requires authentication checked (with my correct login/password). 

The smtp server is not my own server, so I do not have any access to the server logs unfortunately. The owner is a well known french mail service : laposte.net

I run into this issue on both KDE 4.9.5 on Kubuntu 12.04 and on KDE 4.10.2 on Kubuntu 13.04.


Reproducible: Always

Steps to Reproduce:
1.Configure a smtp server with SSL encryption on port 465 with authentication
2.Send a mail with this smtp server

Actual Results:  
The mail is not sent, the transport and writing to the socket failed

Expected Results:  
The mail is sent !