Raspberry Pi Configurate steps:

1. Open ClawsMail

2. Edit your info (if you didn't used it before it comes up with this)

Attach:YourInfo.png

3. Imap Settings

Attach:ServerSetting.png

4. Smtp Settings

Attach:SendSettings.png

5. Accept SSL

Attach:AcceptSSL.png

6. Go to preferences and click on current account

Attach:Preferences.png

7. Change the port settings else it wont work

Attach:portssettings.png

And you are done